This article examines Hobbes’s conception of mathematical method, situating his methodological writings in the context of disputed mathematical issues of the seventeenth century. After a brief exposition of the Hobbesian philosophy of mathematics, it investigates Hobbes’s attempts to resolve three important mathematical controversies of the seventeenth century: the debates over the status of analytic geometry, disputes over the nature of ratios, and the problem of the “angle of contact” between a curve and tangent. In the course of these investigations, Hobbes’s (...) account of mathematics and its method is contrasted with the those of Descartes, Isaac Barrow, John Wallis, and Christopher Clavius. (shrink)

Thomas Hobbes was, rather famously, a nominalist. The core of that nominalism is the belief that the only universal things are universal names: there are no universal objects, or universal ideas. This paper looks at what Hobbes's views about universal names were, how they evolved over time, and how Hobbes argued for them. The remainder of the paper considers two objections to Hobbes's view: a criticism made by several of Hobbes's contemporaries, that Hobbes's view could not account for people saying (...) the same thing in different languages; and a more recently popular criticism of Hobbes, that his nominalism's reliance on similarity implicitly (and inconsistently) involves reliance on a universal. (shrink)

Language was central to Hobbes's understanding of human beings and their mental abilities, and criticism of other philosophers' uses of language became a favorite critical tool for him. This paper connects Hobbes's theories about language to his criticisms of others' language, examining Hobbes's theories of propositions and truth, and how they relate to his claims that various sorts of proposition are absurd. It considers whether Hobbes in fact means anything more by 'absurd' than 'false'. And it pays particular attention to (...) Hobbes's categorization of causes of absurdity and of types of incoherent proposition, arguing that Hobbes's approach is only loosely related to later discussions of category mistakes. (shrink)

The status of the laws of nature in Hobbes’s Leviathan has been a continual point of disagreement among scholars. Many agree that since Hobbes claims that civil philosophy is a science, the answer lies in an understanding of the nature of Hobbesian science more generally. In this paper, I argue that Hobbes’s view of the construction of geometrical figures sheds light upon the status of the laws of nature. In short, I claim that the laws play the same role as (...) the component parts – what Hobbes calls the “cause” – of geometrical figures. To make this argument, I show that in both geometry and civil philosophy, Hobbes proceeds by a method of synthetic demonstration as follows: 1) offering a thought experiment by privation; 2) providing definitions by explication of “simple conceptions” within the thought experiment; and 3) formulating generative definitions by making use of those definitions by explication. In just the same way that Hobbes says that the geometer should “put together” the parts of a square to learn its cause, I argue that the laws of nature are the cause of peace. (shrink)

Hobbes repeatedly expressed concerns about moral and political language, e.g., about the bad consequences of various uses and misuses of language. He did not simply focus on the consequences though. He also attempted to understand the problems, using the central semantic notion in his philosophy of language, signification. Hobbes, in both the Elements of Law and Leviathan, argues that a wide variety of terms – including ‘good’, ‘bad’, and the names of virtues and vices – have a double and inconstant (...) signification. This paper explores and explains that theory of Hobbes's. (In the course of the discussion, two other interpretations of Hobbes's claims are discussed: Pettit’s discussion in terms of indexicals, and Alexandra’s in terms of sense and reference.) This phenomenon is, Hobbes thinks, pervasive in our use of moral and political language. Indeed he says his analysis applies to all “names of such things as affect us, that is, which please, and displease us” (Leviathan 4.24), which seems a very broad category indeed. This inconstancy of signification has considerable potential to cause confusion and conflict. Given those practical consequences, it is of some importance for Hobbes to find a solution to this problem. The paper examines several possible Hobbesian solutions to the problem. There is, however, reason to think that these suggested solutions cannot completely solve the problem. The paper concludes, then, by arguing that double and inconstant signification would always be a danger, even in a properly constituted Hobbesian commonwealth. (shrink)

The subject of this chapter is the complex and confusing course of the discussion of cause and teleology before and during the period of Mill and Comte, and its aftermath up to the early years of the twentieth century in the thinking of several of the major founding figures of disciplinary social science. The discussion focused on the problem of the sufficiency of causal explanations, and particularly the question of whether some particular fact could be explained without appeal to purpose. (...) In response to such questions, the defenders of the new conception attempted to replace older terminology with new (“function” for “purpose,” for example), sometimes muddling the issues, sometimes turning them into terminological disputes, and sometimes making the different positions difficult to distinguish. The problem of methodological unity in the social sciences is rooted in the discussions of the time. (shrink)

I propose to examine here, at the outset, what I call the asymmetry in Thomas Hobbes's thought between his treatment of civil war and war between states, that is to say, between the departure from the state of nature - when that is a condition prevailing between individuals - and the permanency in the state of nature when it forms a condition existing between states. Secondly, I will address the Kantian progression beyond this asymmetry through the dual introduction of the (...) idea of progress and of ‘cosmo-political’ peace. The attention given in recent years by Habermas to the Kantian idea of perpetual peace [Habermas, 1996], the recent events in Kosovo and Chechnya, and their implications for the shape of an international penal tribunal to judge crimes against humanity, invigorate the questions of civil peace and of rights which transcend state frontiers. (shrink)

In Human Nature, Hobbes argues for what I call the ‘Great Deception Thesis’: “whatsoever accidents or qualities our senses make us think there be in the world, they are not there, but are seemings and apparitions only.” I argue that both the thesis and Hobbes’ arguments for it have been misunderstood. Rather than arguing for indirect realism or a primary/secondary quality distinction, Hobbes claims that no sensory experience resembles its object. I conclude by showing how Hobbes can account for the (...) usefulness of images even in the absence of any resemblance between those images and the objects that cause them. If I am right, Hobbes presents a distinctive and intriguing theory of perception, one that emphasizes the dynamic nature of experience. (shrink)

Hobbes’s interpreters have struggled to find a plausible semantics for evaluative language in his writings. I argue that this search is misguided. Hobbes offers neither an account of the reference of evaluative terms nor a theory of the truth-conditions for evaluative statements. Rather, he sees evaluative language simply as having the non-representational function of prescribing actions and practical attitudes, its superficially representational appearance notwithstanding. I marshal the evidence for this prescriptivist reading of Hobbes on evaluative language and show how it (...) sidesteps various textual and philosophical problems that bedevil the traditional interpretations. (shrink)

Against the dominant view in contemporary Hobbes scholarship, I argue that Hobbes’ philosophy of language implicitly denies that linguistic expressions refer to anything. I defend this thesis both textually, in light of what Hobbes actually said, and contextually, in light of Hobbes’ desertion of the vocabulary of suppositio, which was prevalent in semantics leading up to Hobbes. Hobbes explained away the apparent fact of linguistic reference via a reductive analysis: the relation between words and things wholly reduces to a composite (...) of the relation of signification between words and conceptions on the one hand, and the relation of representation between conceptions and things on the other. Intentionality, for Hobbes, accrues to conceptions, not words. (shrink)

O objetivo do presente artigo é apresentar e confrontar os pressupostos de duas tradições interpretativas _Leviatã _de Thomas Hobbes. Pretendo demonstrar como, a partir dos pressupostos e dos critérios de interpretação de cada uma delas, teremos não apenas duas abordagens diversas, mas resultados e soluções distintas para problemas políticos e morais que o próprio Hobbes buscou solucionar com essa obra. Na primeira parte do artigo, apresentarei os aspectos inovadores da nova interpretação do _Leviatã_ em contraposição às interpretações tradicionais ou ortodoxas. (...) Na segunda parte, confrontarei essa abordagem com a abordagem tradicional sobre um problema específico, mas central na filosofia de Hobbes: o problema da desordem social. Apresentarei a tese tradicional segundo a qual a solução para o problema da desordem seria criar um poder capaz de impor sanções que não permitissem que o interesse racional egoísta atuasse de forma irrestrita. Em seguida, apresentarei a solução revisionista segundo a qual a solução seria produzir uma estável e apropriada reconfiguração dos diversos interesses morais e religiosos dos cidadãos através de um processo de educação contínua responsável pelo consenso social. (shrink)