[For an updated version of this thesis, see Frederik A. Bakker, Epicurean Meteorology: Sources, Method, Scope and Organization, Leiden/Boston: Brill, 2016] This dissertation consists of three studies dealing with various aspects of Epicurean cosmology. The first study discusses the Epicurean practice of explaining astronomical and meteorological phenomena by multiple alternative theories. The second study compares the meteorological accounts of Epicurus and Lucretius with other ancient meteorologies as regards the scope and order of their subject matter. The third (...) one examines the claim that Epicurus and Lucretius held the earth to be flat. (shrink)

This paper examines an ancient debate over the rationality of perception. What leads the Stoics to affirm, and the Epicureans to deny, that to form a sense-impression is an activity of reason? The answer, we argue, lies in a disagreement over what is required for epistemic success. For the Stoics, epistemic success consists in believing the right propositions, and only rational states, in virtue of their predicational structure, put us in touch with propositions. Since they identify some sense-impressions as criteria (...) of truth and thus as the basis for epistemic success, the Stoics maintain that sense-impressions must be rational. The Epicureans agree with the Stoics that sense-impressions function as criteria of truth, and also agree broadly on what it means for a state to be rational, but deny that sense-impressions are rational because (1) they think that epistemic success must be supported by a state that is necessarily error-free and (2) accept that rational states can be false. In reconstructing this debate, we refine the standard interpretation of the fundamental difference between Epicurean and Stoic epistemology and also develop parallels with epistemological debates today. One upshot is a more nuanced appreciation of the merits of Epicurean epistemology vis-à-vis the Stoics. (shrink)

The paper discusses the manner and extent to which Epicurean ethics can serve as a general philosophy of life, capable of supporting philosophical practice in the form of philosophical counseling. Unlike the modern age academic philosophy, the philosophical practice movement portrays the philosopher as a personal or corporate adviser, one who helps people make sense of their experiences and find optimum solutions within the context of their values and general preferences. Philosophical counseling may rest on almost any school of (...) philosophy, ranging — in the Western tradition from Platonism to the philosophy of language or logic. While any specialist school of philosophy may serve valuable purposes by elucidating specific aspects of one’s experiences and directing future action, the more ‘generalist’ the philosophy used as the basis for counseling is, the broader and more far-reaching its potential impact on the person undergoing counseling. Epicurean ethics is a prime example of a philosophy of life that is suitable for philosophical counseling today. Its closer examination reveals that, contrary to superficial opinion, it is not opposed to Stoicism and may in fact incorporate Stoicism and its antecedent virtues (including many Christian virtues) in a simple yet comprehensive practical system of directions for modern counseling. (shrink)

Epicurus is strongly committed to psychological and ethical egoism and hedonism. However, these commitments do not square easily with many of the claims made by Epicureans about friendship: for instance, that the wise man will sometimes die for his friend, that the wise man will love his friend as much as himself, feel exactly the same toward his friend as toward himself, and exert himself as much for his friend's pleasure as for his own, and that every friendship is worth (...) choosing for its own sake. These claims have led some scholars to assert that Epicurus inconsistently affirms that friendship has an altruistic element. I argue that the Epicurean claims about friendship can be reconciled with egoism and hedonism in psychology and ethics. Friendship is valuable because having friends provides one with security more effectively than any other means, and having confidence that one will be secure in the future either is identical to ataraxia, or the grounds on which one has it. (shrink)

Many Epicurean arguments for the claim that death is nothing to us depend on the ‘Experience Constraint’: the claim that something can only be good or bad for us if we experience it. However, Epicurus’ commitment to the Experience Constraint makes his attitude to will-writing puzzling. How can someone who accepts the Experience Constraint be motivated to bring about post mortem outcomes?We might think that an Epicurean will-writer could be pleased by the thought of his/her loved ones being (...) provided for after his/her death. Warren has argued that this does not dissolve the puzzle, since it involves a hope which the Epicurean should take to be empty just as the fear of death is empty. However, if it is a necessary condition of an emotion’s being empty that it involve accepting a claim which is not only false but also harmful it is not clear that this hope is indeed ‘empty’: there is a crucial disanalogy between fearing death and hoping for the prosperity of one’s children here. And if emptiness does... (shrink)

The Epicureans advocate a moderately ascetic lifestyle on instrumental grounds, as the most effective means to securing tranquility. The virtuous person will reduce his desires to what is natural and necessary in order to avoid the trouble and anxiety caused by excessive desire. So much is clear from Epicurus' general ethics. But the later Epicurean Philodemus fills in far more detail about the attitude a wise Epicurean will take toward wealth in his treatise On Property Management. This paper (...) explores some of Philodemus' distinctive doctrines and argues that Philodemus' position on crafts is an improvement on the Socratic and Aristotelian positions that he is reacting against. Philodemus rejects both constraints on what counts as a genuine craft proposed by Socrates in the Gorgias: that a craft aims at a genuine good, and that it is based on a grasp of the nature of its subject. Philodemus also rejects the attempts of Xenophon and Theophrastus to preserve an important place for the craft of property management, conceived of as aiming at maximizing your wealth, within the Socratic and Aristotelian ethical tradition that puts virtue and virtuous activity at the center of the happy life. According to Philodemus, cultivating and exercising the traditional technê of property management is actually incompatible with being a virtuous person and obtaining happiness. (shrink)

Epicurus thought that the conventional values of Greek society—in particular, its celebration of luxury and wealth—often led people astray. It is by rejecting these values, reducing our desires, and leading a moderately ascetic life that we can attain happiness. But Epicurus’ message is also pertinent for those of us in modern Western culture, with an economy based on constant consumption and an advertising industry that molds us to serve that economy by enlarging our desires. This paper begins with an outline (...) of some of the basic tenets of Epicurean ethics, followed by an explanation of how these tenets lead to an Epicurean diagnosis of what ails modern consumers and of the cure they would propose. The paper closes with a consideration of recent psychological research in well-being and how it supports the Epicurean position. (shrink)

In ’Abortion and deprivation: a reply to Marquis’, Anna Christensen contends that Don Marquis’ influential ’future like ours’ argument for the immorality of abortion faces a significant challenge from the Epicurean claim that human beings cannot be harmed by their death. If deprivation requires a subject, then abortion cannot deprive a fetus of a future of value, as no individual exists to be deprived once death has occurred. However, the Epicurean account also implies that the wrongness of murder (...) is also not grounded in the badness of death, which is strongly counterintuitive. There is an alternative: we can save our intuitions by adopting a more moderate Epicurean account such as that proposed by David Hershenov, who grounds the wrongness of killing in the prevention of the benefit of further good life rather than in the badness of death. Hershenov’s account, however, is equally applicable to Marquis’ argument: abortion similarly prevents a fetus from enjoying the benefit of a future like ours. Consequently, we conclude that Christensen’s criticism of Marquis’ argument fails to undermine his reasoning. (shrink)

The Acceptance of the Epicurean Thesis on Pleasure as the Absence of Pain -/- In this paper, I will argue that the Epicurean thesis on pleasure (hēdonē) as the absence of pain is a true claim and, moreover, is plausible. First, I will give justifications for the acceptance of pleasure as the absence of pain, as the Epicureans intended it to be understood. Then, I will offer further justification for the acceptance of a more extreme thesis on pleasure, (...) specifically the Epicurean thesis which is interpreted to mean that the greatest pleasure occurs in the complete absence of pain. In order to do this, I present the following premises to support the irrefutability of the Epicurean thesis on pleasure. For the first premise, I present the Epicurean belief of the blessed life with respect to the pleasure-pain relationship. Forthe second premise, I discuss the extent to which Epicurean pleasure is hedonistic in nature. For the third premise, I show that, in the Epicurean philosophy, there is calculation of pleasure and pain, which is an important contributing factor to the plausibility of the thesis. Thus, the premises support the plausibility and, in fact, lead to the coherent acceptance of the Epicurean thesis on pleasure as the absence of pain and, more specifically, the greatest pleasure as the complete absence of pain. (shrink)

Epicurean ethics has been subject to withering ancient and contemporary criticism for the supposed irreconcilability of Epicurus’s emphatic endorsement of friendship and his equally clear and striking ethical egoism. Recently, Matthew Evans (2004) has suggested that the key to a plausible Epicurean response to these criticisms must begin by understanding why friendship is valuable for Epicurus. In the first section of this paper I develop Evans’ suggestion further. I argue that a shared conception of the human telos and (...) of what is required to attain it structures the confidence that characterizes friendship. In the second part of the paper I return to two contemporary criticisms of Epicurean friendship. The first criticism focuses on the problem of free riders. The second criticism points to a seeming inconsistency in Epicurean doctrine. I suggest that both criticisms can be adequately addressed once we understand Epicurean friendship in greater depth. (shrink)

In a recent paper, Gray, Knickman, and Wegner present three experiments which they take to show that people judge patients in a persistent vegetative state to have less mental capacity than the dead. They explain this result by claiming that people have implicit dualist or afterlife beliefs. This essay critically evaluates their experimental findings and their proposed explanation. We argue first that the experiments do not support the conclusion that people intuitively think PVS patients have less mentality than the dead. (...) And second, we provide an alternative explanation of our ascriptions of mentality to the dead and PVS patients, one which turns on Epicurean considerations about the nature of death. (shrink)

Through a radical new reading of the Theological Political Treatise, Dimitris Vardoulakis argues that the major source of Spinoza’s materialism is the Epicurean tradition that re-emerges in modernity when manuscripts by Epicurus and Lucretius are rediscovered. This reconsideration of Spinoza’s political project, set within a historical context, lays the ground for an alternative genealogy of materialism. Central to this new reading of Spinoza are the theory of practical judgment (understood as the calculation of utility) and its implications for a (...) theory of democracy that is resolutely positioned against authority. (shrink)

Epicureans and Stoics reject the independent existence of the Platonic Ideas. This paper assesses what both schools put forward as substitutes for universals. Both Epicureans and Stoics appeal to an a posteriori mental capacity for generalisation but that is where their shared commitments end. the divergences are mapped out, against a tendency in historiography to assimilate the two strategies, and both theories are then analysed independently.

ABSTRACT: Hobbes belonged to philosophical and scientific circles grappling with the big question at the dawn of modern physics: materialism and its consequences for morality. ‘Matter in motion’ may be a core principle of this materialism but it is certainly inadequate to capture the whole project. In wave after wave of this debate the Epicurean view of a fully determined universe governed by natural laws, that nevertheless allows to humans a sphere of libertas, but does not require a creator (...) god or teleology to explain it, comes up against monotheism and its insistence on the incoherence of an ordered world in the absence of a God and his purposes. The following questions were central to this debate: Can we understand the universe as law-governed in the absence of a god? If so, what room is there in a fully determined mechanical universe for human freedom? If humans do enjoy freedom, does the same hold for other animals? Is this freedom compatible with standard views of morality? (shrink)

This chapter offers an overview of the Epicurean conception of philosophy, with special attention to the value of physics. The Epicureans value physics not only for its ability to help remove superstitious beliefs about the gods and death, but also for its ability to stabilize our beliefs and to give causal accounts of ethically-relevant kinds such as pleasure and desire.

Astronomy and religion have long been intertwined with their interactions resembling a symbiotic relationship since prehistoric times. Building on existing archaeological research, this study asks: do the interactions between astronomy and religion, beginning from prehistory, form a distinct religious tradition? Prior research exploring the prehistoric origins of religion has unearthed evidence suggesting the influence of star worship and night sky observation in the development of religious sects, beliefs and practices. However, there does not yet exist a historiography dedicated (...) to outlining why astronomy and religion mutually developed, nor has there been a proposal set forth asserting that these interactions constitute a religious tradition; proposed herein as the Astronic tradition, or Astronicism. This paper pursues the objective of arguing for the Astronic tradition to be treated, firstly, as a distinct religious tradition and secondly, as the oldest archaeologically-verifiable religious tradition. To achieve this, the study will adopt a multidisciplinary approach involving archaeology, anthropology, geography, psychology, mythology, archaeoastronomy and comparative religion. After proposing six characteristics inherent to a religious tradition, the paper will assemble a historiography for astronomical religion. As a consequence of the main objective, this study also asserts that astronomical religion, most likely astrolatry, has its origins in the Upper Palaeolithic period of the Stone Age based on specimens from the archaeological record. The assertion is made that astrolatry is the original religion and fulfils the Urreligion theory. To end, the proposed characteristics of a religious tradition will be applied to Astronicism to ultimately determine whether it is a valid tradition that can stand alongside the established Abrahamic, Dharmic and Taoic traditions. (shrink)

In the first months of the COVID-19 pandemic, we created and implemented from November 2020 to February 2021 a monthly educational pilot program of philosophical management of stress based on Science, Humanism and Epicurean Pragmatism, which was offered to employees of 26 municipalities in the Prefecture of Attica, Greece. The program named “Philosophical Distress Management Operation System” (Philo.Di.M.O.S.) is novel and unique in its kind, as it combines a certain Greek philosophical tradition (Epicurean) that concurs with modern scientific (...) knowledge. The program was designed to be implemented in a period of crisis; therefore, it used a fast-paced, easy to learn and practice philosophical approach to stress management, based on cognitive psychotherapy. The philosophical approach to stress management has the advantage that it can be offered to most people, regardless of age and educational level. The pilot program was effective in achieving its objectives, shown by statistical comparisons of the trainees’ responses to anonymous questionnaires before and after the month-long training. The successful Philo.Di.M.O.S. program, thus, based on a solid scientific and philosophical basis, offers a paradigm of stress management during crises and could be useful in Greece and internationally. (shrink)

I argue that both Hobbes and Spinoza rely on a pivot epicurean idea to form their conceptions of the social contract, namely, the idea that the human acts by calculating their utility. However, Hobbes and Spinoza employ this starting principle in different ways. For Hobbes, this only makes sense if the calculation of utility is regulated by fear as the primary political emotion. For Spinoza, there is no primary emotion and the entire construction of the social contract relies on (...) how the calculation of utility is carried out. I argue that this conception of the social contract leads Spinoza to espouse a radical position about the political, which has been overlooked by those like Antonio Negri who read Spinoza as a radical democrat. (shrink)

In this paper, it is argued that there can be necessary and non-natural desires. After a discussion about what seems wrong with such desires, Epicurus’ classification of desires is treated similarly to Kripke’s treatment of the Kantian table of judgments. A sample of three cases is suggested to make this point.

There seems to be universal agreement among Epicurean scholars that friendship characterized by other-concern is conceptually incompatible with Epicureanism understood as a directly egoistic theory. I reject this view. I argue that once we properly understand the nature of friendship and the Epicurean conception of our final end, we are in a position to demonstrate friendship’s compatibility with, and centrality within, Epicureanism’s direct egoism.

This paper examines the significance of Epicureanism for Nietzsche’s critique of Christian monotheism and his subsequent attempt to reanimate a kind of this-worldly, affirmative religiosity of immanence. After a brief overview of the pivotal role that Epicurus’ thought plays in the death of God, I focus on Epicurus’ own residual conception of the gods and the ways in which Nietzsche strategically retrieves it and puts it use in his writing. Nietzsche juxtaposes the distant, serene, indifferent Epicurean gods with the (...) omniscient, intrusive, jealous and needy God of middle-Eastern monotheisms. One might say that they constitute a ‘halfway house’ of sorts between Christianity and Nietzsche’s new Dionysian religion of the earth. But they also figure prominently in his own conflicted desire to intervene in the aleatory course of natural history and legislate the the future of humanity: Nietzsche finds he cannot simply look down with “the mocking and aloof eyes” of an Epicurean god upon the degeneration and diminution of the human being under Christian ascetic regimes of cultivation. Ultimately, Nietzsche fails to achieve the divine temperament of the Epicurean gods (looking down from afar on human ignorance, desire and suffering with a noble pathos of distance). Forthcoming 2022. (shrink)

Pierre Gassendi was a major factor in the revival of Epicureanism in early modern philosophy, not only through his contribution to the restoration and criticism of Epicurean texts, but also by his adaptation of Epicurean ideas in his own philosophy, which was itself influential on such important figures of early modern philosophy as Hobbes, Locke, Newton, and Boyle (to name just a few). Despite his vigorous defense of certain Epicurean ideas and ancient atomism, Gassendi goes to great (...) lengths to differentiate his philosophy from Epicureanism on certain key points. In this paper I argue that those key points on which Gassendi rejects and and criticizes the Epicurean view, such as the immortality of the soul and divine creation of the cosmos, are central not only to Epicureanism, but also to Gassendi's own philosophy. In order to see Gassendi's philosophy for what it is, and understand its role in the history of natural theology, we need accept and understand better why he rejected the central theses of Epicureanism. (shrink)

In the first few pages of chapter 4 of his Theological Political Treatise (1670), Spinoza defines his conception of the law. In fact, he defines the law twice, first in terms of compulsion or necessity and then in terms of use. I would like to investigate here these definitions, in particular the second one, as it is Spinoza’s preferred one. The difficulty with understanding this definition is that it contains an expression, ratio vivendi, that is repeated several times in the (...) first few pages of chapter 4, but, unless it is taken as a technical term referring to law as use, it is easy to mistake it as a casual expression that might mean different things each time. As a result, it is indispensable to turn to the Latin text to unlock the technical meaning of ratio vivendi. The result will be that Spinoza's conception of the law aligns with the epicurean conception of the law understood in terms of use. (shrink)

The philosophy of historical sciences investigates their distinct objects of study, epistemic challenges, and methodological solutions. Rethinking astronomy in this light offers a contribution. First, the methodology of historical sciences adds to a more adequate description of how astronomers study and utilize token events. Second, astronomy faces a typical difficulty in identifying traces of some past events and has developed a delicate solution. This enriches the idea of trace and suggests a methodology that relies on iterations between data-driven (...) approaches and theory-driven approaches, together with the cross-validation between multiple relevant historical events or datasets. (shrink)

In his dialogue, 'Non posse suaviter vivi secundum Epicurum', Plutarch of Chaeronea criticizes Epicurus for not believing that the gods are provident over human affairs and for not believing that our souls survive death. However, Plutarch’s arguments are striking in that they do not offer any theoretical justification for believing either of these religious claims to be true; rather, they aim to establish that we are practically justified in adopting them if we follow Epicurus’s rule that the goal of belief (...) is not truth in its own right, but mental tranquility. I argue that this form of argument assumes a novel justificatory theory of religious belief, based in Epicurean thought, that I call ‘strong doxastic hedonism.’. (shrink)

For centuries the case of Galileo Galilei has been the cornerstone of every major argument against the church and its supposedly unscientific dogmatism. The church seems to have condemned Galileo for his heresies, just because it couldn’t and wouldn’t handle the truth. Galileo was a hero of science wrongfully accused and now – at last – everyone knows that. But is that true? This paper tries to examine the case from the point of modern physics and the conclusions drawn are (...) startling. It seems that contemporary church was too haste into condemning itself. The evidence provided by Galileo to support the heliocentric system do not even pass simple scrutiny, while modern physics has ruled for a long time now against both heliocentric and geocentric models as depictions of the “truth”. As Einstein eloquently said, the debate about which system is chosen is void of any meaning from a physics’ point of view. At the end, the selection of the center is more a matter of choice rather than a matter of ‘truth’ of any kind. And this choice is driven by specific philosophical axioms penetrating astronomy for hundreds of years now. From Galileo to Hubble, the Copernican principle has been slowly transformed to a dogma followed by all mainstream astronomers. It is time to challenge our dogmatic adherence to the anti-humanism idea that we are insignificant in the cosmos and start making true honest science again, as Copernicus once postulated. (shrink)

Anna Christensen argues that it is implausible to claim that abortion and murder are morally impermissible given that they deprive individuals of a future like ours (or ’FLO"). In this essay, I provide two responses to Christensen’s argument. First, I show that the premises upon which Christensen’s argument relies have implausible implications. Second, I provide a direct response to Christensen’s challenge, showing that abortion and murder are morally impermissible given that they do deprive individuals of an FLO. Doing so involves (...) drawing a distinction between (1) Acts of killing and (2) Death (which is the outcome of acts of killing). Christensen focuses on the latter, but it is the former that is the proper subject in the abortion debate. I conclude that Christensen has failed to provide a response to arguments—like the one presented by Marquis —that murder and abortion are impermissible given that they deprive individuals of an FLO. (shrink)

The Epicurean account of the origin of language appealed to eighteenth-century thinkers who tried to reconcile a natural history of language with

the biblical account of Adamic name-giving. As a third way between Aristotelian linguistic conventionality and what was perceived as a Platonic supernatural congruence between words and things, Epicurus’

theory allowed for a measure of contingency to emerge in the evolution of initially natural signs. This hypothesis was taken up by authors as different from one another as Leibniz, Vico, Condillac (...) and Mendelssohn. By integrating the Epicurean account of language into their own theories, however, these authors also revived the tensions inherent in the ancient thesis and had to confront the ensuing difficulties in innovative ways. (shrink)

Appeals to nature are ubiquitous in Epicurean ethics and politics. The foundation of Epicurean ethics is its claim that pleasure is the sole intrinsic good and pain the sole intrinsic evil, and this is supposedly shown by the behavior of infants who have not yet been corrupted, "when nature's judgement is pure and whole." Central to their recommendations about how to attain pleasure is their division between types of desires: the natural and necessary ones, the natural but non-necessary (...) ones, and the vain and empty ones. Elsewhere, the Epicureans talk about the "natural goods" of political power and fame, and they contrast "natural wealth" with wealth as "defined by empty opinion." Finally, in their politics, Epicurus claims that the "the justice of nature is a pledge of reciprocal usefulness, [i.e.,] neither to harm one another nor to be harmed." This paper explores two questions regarding these various appeals to nature. The first is: what is it for these things to be natural, i.e., what notion of "natural" or "nature" is at play here? (Furthermore, is there a single notion being used across these appeals, and if not, how are they related?) The second is: what normative work does a thing's being natural do? That is, what reason, if any, does a desire's being natural give me for pursuing the object of that desire and trying to fulfill that desire, as opposed to not doing so and trying to eliminate it, and similarly for the other appeals to nature? (shrink)

Studie se věnuje čtyřem astronomickým pomůckám, které vytvořil a užíval Gerbert z Aurillacu, remešský a ravennský arcibiskup, opat v Bobbiu a v letech 999–1003 papež. Gerbert vyučoval quadrivium především v Remeši a od jeho žáka Richera z Remeše a z Gerbertových dopisů víme o čtyřech jeho přístrojích, které poskytovaly srozumitelný a názorný úvod do geocentrického výkladu veškerenstva: 1. glóbus světové sféry s nastavitelným horizontem; 2. pozorovací hemisféra s pěti rovnoběžnými kruhy světové sféry ; 3. armilární sféra s vnitřním umístěním ekliptiky (...) a oběžných drah planet; 4. armilární sféra s vnějším umístěním hvězd a souhvězdí. (shrink)

ABSTRACT This article interprets a recently recovered manuscript, Tratado de astronomía y la reformaçión del tiempo, composed by Antonio Sánchez in New Granada c.1696, in the context of the Spanish and Renaissance cosmographies. Sánchez’s Tratado proposes a spherical astronomy, in which celestial bodies – including comets — move in orbs containing pyramidal knots that explain the changing speed observed in the motion of planets. From this astronomy and following the peninsular style of repertorios, Sánchez derives two major conclusions: (...) the corrected length of the solar year and a revised birth date of Jesus. Taking as center of reference Vélez, where Sánchez was based, these claims led to conclusions in domains ranging from calendric astronomy to eschatology, including the incorporation of the indigenous peoples into salvation narrative and a demonstration of the arrangement of the celestial orbs at the Last Judgment. Sánchez’s Tratado constitutes an expansion of the Spanish mathematical cosmography that sheds light on the production of knowledge in the Spanish-American world and, at the same time, provides elements to reassess our understanding of the global circulation of Renaissance and early modern ideas. (shrink)

The latest draft (posted 05/14/22) of this short, concise work of proof, theory, and metatheory provides summary meta-proofs and verification of the work and results presented in the Theory and Metatheory of Atemporal Primacy and Riemann, Metatheory, and Proof. In this version, several new and revised definitions of terms were added to subsection SS.1; and many corrected equations, theorems, metatheorems, proofs, and explanations are included in the main text. The body of the text is approximately 18 pages, with 3 sections; (...) 1, an Introduction (with a 108 page listing of key terms & definitions), sect. 2, the Results, sect. 3, Discussion (commentary & predictions), and sect. 4, Works Cited. As much as possible, the style is intended for readability and understanding by very bright children (with some interest & knowledge of maths, etc.) and very interested nonprofessionals. The results of this project also enable upgrades of number theory, set theory, proof theory, metamathematics, the foundations of science, and quantum mechanics theory (etc.). (shrink)

Observational astronomy is plagued with selection effects that must be taken into account when interpreting data from astronomical surveys. Because of the physical limitations of observing time and instrument sensitivity, datasets are rarely complete. However, determining specifically what is missing from any sample is not always straightforward. For example, there are always more faint objects (such as galaxies) than bright ones in any brightness-limited sample, but faint objects may not be of the same kind as bright ones. Assuming they (...) are can lead to mischaracterizing the population of objects near the boundary of what can be detected. Similarly, starting with nearby objects that can be well observed and assuming that objects much farther away (and sampled from a younger universe) are of the same kind can lead us astray. Demographic models of galaxy populations can be used as inputs to observing system simulations to create “mock” catalogues that can be used to characterize and account for multiple, interacting selection effects. The use of simulations for this purpose is common practice in astronomy, and blurs the line between observations and simulations; the observational data cannot be interpreted independent of the simulations. We will describe this methodology and argue that astrophysicists have developed effective ways to establish the reliability of simulation-dependent observational programs. The reliability depends on how well the physical and demographic properties of the simulated population can be constrained through independent observations. We also identify a new challenge raised by the use of simulations, which we call the “problem of uncomputed alternatives.” Sometimes the simulations themselves create unintended selection effects when the limits of what can be simulated lead astronomers to only consider a limited space of alternative proposals. (shrink)

Originating in the field of biology, the concept of the hybrid has proved to be influential and effective in historical studies, too. Until now, however, the idea of hybrid knowledge has not been fully explored in the historiography of pre-modern science. This article examines the history of pre-Copernican astronomy and focuses on three case studies—Alexandria in the second century CE; Baghdad in the ninth century; and Constantinople in the fourteenth century—in which hybridization played a crucial role in the development (...) of astronomical knowledge and in philosophical controversies about the status of astronomy and astrology in scholarly and/or institutional settings. By establishing a comparative framework, this analysis of hybrid knowledge highlights different facets of hybridization and shows how processes of hybridization shaped scientific controversies. (shrink)

I begin by sketching the Epicurean position on death - that it cannot be bad for the one who dies because she no longer exists - which has struck many people as specious. However, alternative views must specify who is wronged by death (the dead person?), what is the harm (suffering?), and when does the harm take place (before death, when you’re not dead yet, or after death, when you’re not around any more?). In the second section I outline (...) the most sophisticated anti-Epicurean view, the deprivation account, according to which someone who dies is harmed to the extent that the death has deprived her of goods she would otherwise have had. In the third section I argue that deprivation accounts that use the philosophical tool of possible worlds have the counterintuitive implication that we are harmed in the actual world because counterfactual versions of us lead fantastic lives in other possible worlds. In the final section I outline a neo-Epicurean position that explains how one can be wronged by being killed without being harmed by death and how it is possible to defend intuitions about injustice without problematic appeal to possible worlds. (shrink)

This paper initiates a dialogue between classical Islamic philosophy and late modern European thought, by focusing on two peripheral, ‘heretical’ figures within these traditions: Abū Bakr Muḥammad ibn Zakariyāʾ al-Rāzī and Friedrich Nietzsche. What affiliates these thinkers across the cultural and historical chasm that separates them is their mutual fascination with, and profound indebtedness to, ancient Greek and Hellenistic philosophy. Given the specific themes, concerns and doctrines that they appropriate from this common source, I argue that al-Rāzī and Nietzsche should (...) be read as Epicureans and seen in relation to their predecessor as part of the subterranean tradition of philosophical naturalism. However, while each figure appropriates the philosophy of Epicurus, they ultimately transform it in important ways: al-Rāzī offers us a qualified “Platonic” Epicureanism, while Nietzsche forges a radicalized “Dionysian” Epicureanism. The point of such a comparative examination is twofold. First, analyzing the divergent paths of these “wayward” Epicureans sheds new light on the historical trajectory of naturalism as a philosophical stance (as well as its current prospects and limitations). Second, by initiating a dialogue between the classical Islamic and modern European philosophical traditions, we can better understand the antagonisms and shared concerns between these two horizons, as well as the ambiguities and self-questioning that occur within them. (shrink)

Levi ben Gerson (1288–1344) was a medieval astronomer who responded in an unusual way to the Ptolemaic tradition. He significantly modified Ptolemy’s lunar and planetary theories, in part by appealing to physical reasoning. Moreover, he depended on his own observations, with instruments he invented, rather than on observations he found in literary sources. As a result of his close attention to the variation in apparent planetary sizes, a subject entirely absent from the Almagest, he discovered a new phenomenon of Mars (...) and noticed a serious flaw in Ptolemy’s treatment of the Moon. (shrink)

Celestial bodies have long been a source of religious objectification and this article aims to convey the origin of the relationship between human religious belief and observations of the night sky. The academic search for the origin of religion commenced in the early nineteenth century and since then the debate of whether animism or pre-animism is the original religion has dominated this field. Until now, no unified theory has acknowledged the influence of primitive astronomy on the origin of religion. (...) However, the theory of Astronicism supports the pre-animist hypothesis by proposing that early modern humans of the Upper Palaeolithic made simple associations between celestial bodies and their apparent capacity to determine human survival. This article asserts that these associations led to celestial deification long before humans animated astronomical phenomena with spirits. Archaeological specimens from Europe and beyond including astral rock art, cup marks and engravings are used in this article to assert that astrolatry and astromancy were crucial to the development of religion. (shrink)

In a chapter from his book, "Confrontation with the Reaper," Feldman critiques Epicurus' assertion that nothing inherently negative befalls us after death. However, it is essential to note that the Epicurean argument is more nuanced than Feldman suggests. In this chapter, Feldman undertakes a comprehensive revision of the Epicurean argument, incorporating numerous assumptions supported by evidence to comprehend it. This multiplicity of revisions makes it challenging to trace how Feldman distorts the original Epicurean argument. In this paper, (...) I will endeavor to reconstruct Feldman's line of reasoning, focusing on his conclusion, which posits that death, by depriving the deceased of the intrinsic value of life, introduces an extrinsic evil. According to this view, had death not occurred, the person would have continued to enjoy the intrinsic value of life. However, it is arguable that death does not deprive a person of the intrinsic good inherent in life because, without death, one would still have the opportunity to experience the intrinsic value of life. This perspective finds support in the examples I present to counter Feldman's conclusion: the cases of a cancer patient, a devout Christian, and a Buddhist philosopher who all met their demise. (shrink)

Positive review of Sellars' short introduction to Epicureanism considered as a way of life.

Serial Endosymbiosis Theory, or SET, was conceived and developed by Lynn Margulis, to explain the greatest discontinuity in the history of life, the origin of eukaryotic cells. Some predictions of SET, namely the origin of mitochondria and chloroplasts, withstood the test of the most recent evidence from a variety of disciplines including phylogenetics, biochemistry, and cell biology. Even though some other predictions fared less well, SET remains a seminal theory in biology. In this paper, I focus on two aspects of (...) SET. First, using the concept of "universal symbiogenesis”, developed by Freeman Dyson to search for commonalities in astronomy and biology, I propose that SET can be extended beyond eukaryogenesis. The extension refers to the possibility that even prokaryotic organisms, themselves subject to the process of symbiogenesis in SET, could have emerged symbiotically. Second, I contrast a recent “viral eukaryogenesis” hypothesis, according to which the nucleus evolved from a complex DNA virus, with a view closer to SET, according to which the nucleus evolved through the interplay of the archaeal host, the eubacterial symbiont, and a non-LTR transposon, or telomerase. Viruses joined in later, through the process of viral endogenization, to shape eukaryotic chromosomes in the process of karyotype evolution. These two proposals based on SET are a testament to its longevity as a scientific theory. (shrink)

Within the framework of Positive Psychology and Needing Theories, this article reviews cultural practices or perceptions regarding what happiness is and how it can be achieved. Mainly research on Subjective Well-Being (SWB) has identified many cultural differences in the pursuit of happiness, often described as East-West splits along categories such as highly expressed affect vs. quiet affect, self-assertion vs. conformity to social norms, independence vs. interdependence and the like. However, it is the overall goal of this article to show that (...) whatever the normative content of a culture’s or subculture’s view of happiness may be, it involves the same basic psychological needs beyond how people may choose to report or express resulting emotions. In particular, the theory of happiness proposed by the Hellenistic philosopher Epicurus provides broader, more inclusive categories and concepts which can be used to explain and possibly harmonize assumptions from particular traditions. (shrink)

To the mind of humans death is an impossible riddle, the ultimate of mysteries; therefore it has always been considered a task of paramount importance for philosophers to provide a satisfactory account for death. Among the numerous efforts to deal with the riddle of death, Epicurus’ one stands out not only for its unsurpassed simplicity and lucidness, but also for the innovative manner in which it approaches the issue: Epicurus denounces the fear of death as a profoundly unfruitful, unreasonable and (...) unjustifiable passion of the mind. In this short paper I will first provide a brief account of Epicurus’ argumentation. Then I will argue that, although Epicure’s efforts to annihilate the fear of death proved to be unconvincing (people never ceased to fear death), still in a way they have been successful. Epicurus managed to rationalize in a certain degree the most deeply rooted fear in the souls of humans, and this seems to have been his initial purpose: consolation sometimes is due not only to definite resolution, but also to doubt and inconclusiveness. (shrink)

The attempt to narrow the general discourse of the problem of error and to focus it on the specific problem of experimental error may be approached from different directions. One possibility is to establish a focusing process from the standpoint of history; such an approach requires a careful scrutiny of the history of science with a view to identifying the juncture when the problem of experimental error was properly understood and accounted for. In a study of this kind one would (...) have to examine the evolution of the method of experimentation and related topics so that clear criteria would underlie the analysis. (shrink)

Dark matter in astrophysics offers a rare treat for philosophers of science. When they look at the contemporary science of dark matter, they see reports of a widely accepted theoretical posit indispensable to our best theories and models but without an accepted experimental confirmation of its existence. Nearly all astrophysicists and cosmologists believe that dark matter exists and makes up approximately a quarter of the mass-energy content of the universe. However, they seem to know almost nothing about its nature, cannot (...) directly observe it, and have been unable to detect the products of any interactions with any of the candidate dark matter particles. This project addresses the apparent tension between the impressive knowledge taken to have been obtained in contemporary sciences of the cosmos and the methodological and theoretical limitations in obtaining such knowledge. To do so, this dissertation investigates the ways in which astronomers and astrophysicists are making progress by looking more closely at their experimental practices and actual theoretical commitments. More specifically, the goal is to determine how this bears on longstanding philosophical questions of scientific realism and the nature of scientific experimentation. Ultimately, I argue that astronomers do conduct traditional, interventionist experiments and that we can be realists about dark matter. These two views offer a way of thinking differently about how scientists can and do obtain knowledge about inaccessible and unobservable targets systems. -/- . (shrink)

A review of Martin Harwit, Cosmic Messengers (2021).