One of the most influential of the Victorian philosophers, Henry Sidgwick also made important contributions to fields such as economics, political theory, and classics. An active promoter of higher education for women, he founded Cambridge's Newnham College in 1871. He attended Rugby School and then Trinity College, Cambridge, where he remained his whole career. In 1859 he took up a lectureship in classics, and held this post for ten years. In 1869, he moved to a lectureship in moral philosophy, the (...) subject where he left arguably his greatest mark when he produced this work, regarded as his masterpiece. Published in 1874, the book argues the utilitarian approach to ethics, and a systematic and historically sensitive approach to ethical research that influenced utilitarian philosophers well into the twentieth century. It remains a valuable introduction to the philosophy, practice and history of ethics. This reissue includes the 1877 supplement. (shrink)

This Hackett edition, first published in 1981, is an unabridged and unaltered republication of the seventh edition as published by Macmillan and Company, Limited. From the forward by John Rawls: In the utilitarian tradition Henry Sidgwick has an important place. His fundamental work, The Methods of Ethics, is the clearest and most accessible formulation of what we may call 'the classical utilitarian doctorine.' This classical doctrine holds that the ultimate moral end of social and individual action is the greatest net (...) sum of the happiness of all sentient beings. Happinesss is specified by the net balance of pleasure over pain, or, as Sidgwick preferred to say, as the net balance of agreeable over disagreeable consciousness.... (shrink)

First published in 1985, D. M. Armstrong's original work on what laws of nature are has continued to be influential in the areas of metaphysics and philosophy of science. Presenting a definitive attack on the sceptical Humean view, that laws are no more than a regularity of coincidence between stances of properties, Armstrong establishes his own theory and defends it concisely and systematically against objections. Presented in a fresh twenty-first-century series livery, and including a specially commissioned preface written by Marc (...) Lange, illuminating its continuing importance and relevance to philosophical enquiry, this influential work is available for a new generation of readers. (shrink)

First published in 2005. Routledge is an imprint of Taylor & Francis, an informa company.

It is commonly thought that moral rules and principles, such as ‘Keep your promises,’ ‘Respect autonomy,’ and ‘Distribute goods according to need ,’ should play an essential role in our moral deliberation. Particularists have challenged this view by arguing that principled guidance leads us to engage in worse decision making because principled guidance is too rigid and it leads individuals to neglect or distort relevant details. However, when we examine empirical literature on the use of rules and principles in other (...) domains, we find that people can learn to use rules discriminately and that rule-based models tend to outperform even expert judgment. I argue that this evidence poses a problem for the moral particularist. If the particularist claims that we should not rely on decision-making rules when making practical decisions and it turns out that these rules help us make better decisions, then the particularists’ prescriptive account is deficient. However, if the particularist claims that we should rely on practical decision-making rules but not on moral rules, she needs to explain how practical rules are different from moral rules and why we should rely on the former but not the latter. (shrink)

Issues concerning scientific explanation have been a focus of philosophical attention from Pre- Socratic times through the modern period. However, recent discussion really begins with the development of the Deductive-Nomological (DN) model. This model has had many advocates (including Popper 1935, 1959, Braithwaite 1953, Gardiner, 1959, Nagel 1961) but unquestionably the most detailed and influential statement is due to Carl Hempel (Hempel 1942, 1965, and Hempel & Oppenheim 1948). These papers and the reaction to them have structured subsequent discussion concerning (...) scientific explanation to an extraordinary degree. After some general remarks by way of background and orientation (Section 1), this entry describes the DN model and its extensions, and then turns to some well-known objections (Section 2). It next describes a variety of subsequent attempts to develop alternative models of explanation, including Wesley Salmon's Statistical Relevance (Section 3) and Causal Mechanical (Section 4) models and the Unificationist models due to Michael Friedman and Philip Kitcher (Section 5). Section 6 provides a summary and discusses directions for future work. (shrink)

I defend moral generalism against particularism. Particularism, as I understand it, is the negation of the generalist view that particular moral facts depend on the existence of a comprehensive set of true moral principles. Particularists typically present "the holism of reasons" as powerful support for their view. While many generalists accept that holism supports particularism but dispute holism, I argue that generalism accommodates holism. The centerpiece of my strategy is a novel model of moral principles as a kind of "hedged" (...) principles that incorporate an independently plausible "basis thesis" concerning the explanation of moral reasons. The model implies that moral reasons requires the existence of a comprehensive set of true hedged principles, and so it captures generalism. But the model also offers an alternative explanation of holism, and so it undercuts much of the motivation for particularism. I defend this moderate (because holism-tolerating) form of generalism against a number of objections, and show how it can be used to defeat three distinct arguments from holism to particularism. (shrink)

This paper addresses a recent suggestion that moral particularists can extend their view to countenance default reasons (at a first stab, reasons that are pro tanto unless undermined) by relying on certain background expectations of normality. I first argue that normality must be understood non-extensionally. Thus if default reasons rest on normality claims, those claims won't bestow upon default reasons any definite degree of extensional generality. Their generality depends rather on the contingent distributional aspects of the world, which no theory (...) of reasons should purport to settle. Appeals to default reasons cannot therefore uniquely support particularism. But this argument also implies that if moral generalism entailed that moral reasons by necessity have invariant valence (in the natural extensional sense), it would be a non-starter. Since generalism is not a non-starter, my argument forces us to rethink the parameters of the generalism-particularism debate. Here I propose to clarify the debate by focusing on its modal rather than extensional aspects. In closing, I outline the sort of generalism that I think is motivated by my discussion, and then articulate some worries this view raises about the theoretical usefulness of the label ‘default reason’. -/- [Note: The outline of moral generalism provided in this paper is superseded by those in "Moral Generalism: Enjoy in Moderation" and "A Theory of Hedged Moral Principles".]. (shrink)

Many philosophers believe that the extensions of evaluative terms and concepts aren’t unified under non-evaluative similarity relations and that this “shapelessness thesis” (ST) has significant metaethical implications regarding non-cognitivism, ethical naturalism, moral particularism, thick concepts and more. ST is typically offered as an explanation of why evaluative classifications appear to “outrun” classifications specifiable in independently intelligible non-evaluative terms. This paper argues that both ST and the outrunning point used to motivate it can be explained on the basis of more general (...) factors that have nothing in particular to do with being evaluative. If so, there is no reason to expect ST to carry the sorts of metaethical implications that get attributed to it. I also show that my main argument is robust across certain complications that are raised by the context-sensitivity of many evaluative terms but have so far been ignored in discussions of ST and related matters. (shrink)

This paper makes the non-monotonicity of a wide range of moral reasoning the basis of a case for particularism. Non-monotonicity threatens practical decision with an overwhelming informational complexity to which a form of ethical generalism seems the best response. It is argued that this impression is wholly misleading: the fact of non-monotonicity is best accommodated by the defence of four related theses in any theory of justification. First, the explanation of and defence of a default/challenge model of justification. Secondly, the (...) development of a theory of epistemic status and an explanation of those unearned entitlements that accrue to such status. Thirdly, an explanation of the basis of epistemic virtues. Finally, an account must be given of the executive capacity of rational decision itself as a ‘contentless ability’. This overall set of views can accommodate a limited role for generalizations about categories of evidence, but not such as to rescue a principled generalism. In particular, the version of particularism defended here explains why one ought not to accept the principled holism that has proved to be a problem for Dancy’s form of particularism. Ethics certainly involves hedged principles. However, principles cannot be self-hedging: there cannot be a that’s it operator in a principle as Richard Holton has claimed that there can be. Practical reasoning is concluded by the categorical detachment of the action-as-conclusion itself. (shrink)

I argue that moral principles involve the same sort of generalization as ordinary yet elusive generic generalizations in natural language such as ‘Tigers are striped’ or ‘Peppers are spicy’. A notable advantage of the generic view is that it simultaneously allows for pessimism and optimism about the role and status of moral principles in our lives. It provides a new perspective on the nature of moral principles on which principles are not apt for determining the moral status of particular actions (...) while they may be apt, and even fundamental, to our acquisition of moral knowledge. A natural consequence of the view is variation among moral principles, with some regularly warranting exceptions and some appearing arguably exceptionless. I will also argue that this generic conception of moral principles has significant advantages, as a normative model of moral reasoning, over the view of moral principles as defaults advanced in recent years. (shrink)

According to radical moral particularists such as Jonathan Dancy, there are no substantive moral principles. And yet, few particularists wish to deny that something very like moral principles do indeed play a significant role in our everyday moral practice. Loathe at dismissing this as mere error on the part of everyday moral agents, particularists have proposed a number of alternative accounts of the practice. The aim of all of these accounts is to make sense of our appeal to general moral (...) truths in both reaching and justifying our particular moral judgments without thereby violating the particularists' stricture against substantive moral principles. In this paper, I argue that the most prominent non-substantive accounts of moral generalities appealed to by radical particularists – the heuristic account and default reasons accounts – fail in this aim. (shrink)

The traditional conception of ethical theory sees it as the project of developing a coherent set of rules from which one can infer all determinate moral verdicts. I am not optimistic about the prospects for constructing such a theory. To explain this pessimism, we need to understand what moral rules are and what roles they might play in ethical theory.

Moral Realism is a systematic defence of the idea that there are objective moral standards. Russ Shafer-Landau argues that there are moral principles that are true independently of what anyone, anywhere, happens to think of them. His central thesis, as well as the many novel supporting arguments used to defend it, will spark much controversy among those concerned with the foundations of ethics.

Moral particularism is often conceived as the view that there are no moral principles. However, its most fêted accounts focus almost exclusively on rules regarding actions and their features. Such action-centred particularism is, I argue, compatible with generalism at the level of character traits. The resulting view is a form of particularist virtue ethics. This endorses directives of the form ‘Be X’ but rejects any implication that the relevant X-ness must therefore always count in favour of an action.

This chapter explores bridge-law non-naturalism: the view that when a particular thing possesses a moral property or stands in a moral relation, this fact is metaphysically grounded in non-normative features of the thing in question together with a general moral law. Any view of this sort faces two challenges, analogous to familiar challenges in the philosophy of science: to specify the form of the explanatory laws, and to say when a fact of that form qualifies as a law. The chapter (...) explores three strategies for answering these questions, all of which maintain that a moral law is a true generalization of the form [It is normatively necessary that whatever ϕ‎s is F]. (shrink)

This article aims to clarify the view that thick concepts are irreducibly thick. I do this by putting the disentangling argument in its place and then setting out what nonreductivists about the thick are committed to. To distinguish the view from possible reductive accounts, defenders of irreducible thickness are, I argue, committed to the claim that evaluative concepts and properties are nonevaluatively shapeless. This in turn requires a commitment to (radical) holism and particularism. Nonreductivists are also committed to the claim (...) that a thick concept is in itself evaluative, and not evaluative because of any link to thin evaluation. (shrink)

What are moral principles? The assumption underlying much of the generalism–particularism debate in ethics is that they are (or would be) moral laws: generalizations or some special class thereof, such as explanatory or counterfactual-supporting generalizations. I argue that this law conception of moral principles is mistaken. For moral principles do at least three things that moral laws cannot do, at least not in their own right: explain certain phenomena, provide particular kinds of support for counterfactuals, and ground moral necessities, “necessary (...) connections” between obligating reasons and obligations. Moreover, neither a best-systems theory of moral principles nor any of the competing theories of moral principles proposed by Sean McKeever and Michael Ridge, Pekka Väyrynen, and Mark Lance and Margaret Little could vindicate the law conception of moral principles. I conclude with some brief remarks about what moral principles might be if they are not moral laws. (shrink)

What are moral principles? In particular, what are moral principles of the sort that (if they exist) ground moral obligations or—at the very least—particular moral truths? I argue that we can fruitfully conceive of such principles as real, irreducibly dispositional properties of individual persons (agents and patients) that are responsible for and thereby explain the moral properties of (e.g.) agents and actions. Such moral dispositions (or moral powers) are apt to be the metaphysical grounds of moral obligations and of particular (...) truths about what is morally permissible, impermissible, etc. Moreover, they can do other things that moral principles are supposed to do: explain the phenomena “falling within their scope,” support counterfactuals, and ground moral necessities, “necessary connections” between obligating reasons and obligations. And they are apt to be the truthmakers for moral laws, or “lawlike” moral generalizations. (shrink)

Moral principles play important roles in diverse areas of moral thought, practice, and theory. Many who think of themselves as ‘moral generalists’ believe that moral principles can play these roles—that they are capable of doing so. Moral generalism maintains that moral principles can and do play these roles because true moral principles are statements of general moral fact (i.e. statements of facts about the moral attributes of kinds of actions, kinds of states of affairs, etc.) and because general moral facts (...) explain particular moral facts (i.e. facts about the moral attributes of particulars). Moral holism maintains that what is a moral reason to φ in one case may not be one in another, and may even be a moral reason not to φ given suitable circumstances. Some ‘moral particularists’ maintain that moral holism motivates scepticism about the existence of and need for moral principles, along with scepticism about the viability of principle-based approaches to ethics and moral theory. But I argue that moral holism is itself a form of moral generalism, one that takes facts about the right- and wrong-making powers of (generic) moral factors to explain certain particular moral facts—namely, the rightness and wrongness of particular actions. I also argue that a moral-theoretic version of dispositionalism—the view that dispositions, powers, or capacities are the fundamental units of explanation—explains both why moral holism is true and why moral generalism is true. (shrink)

Particularism's model of explanation is challenged on the ground that a sensible intelligibility principle requires that there must be an explanation for the difference between a good and a bad action. Raz is concerned with what it is to be guided by reason, as well as with the results of the fact that reason can often undermine particular outcomes. What determines the moral status of an action must extend beyond what the agent's reason for acting is. It is argued that (...) there is a clear distinction between the evaluative and guiding functions of reasons. (shrink)

W. D. Ross’s ethical theory requires us somehow to compare the metaphorical “weights” of different prima facie duties, but it leaves mysterious how this might be done. The formulation of a procedure to achieve such a comparison would be desirable on practical, theoretical, and pedagogical grounds. I formulate a procedure that is congenial to Ross’s theory. Central to my procedure are instructions to characterize the weight of each prima facie duty with respect to (a) the general stringency of this kind (...) of duty, (b) the stringency of this particular duty relative to other duties of its own kind, and (c) the degree to which the duty specifically demands the particular action that it favors in a given case. The procedure leads to a determination of one’s actual, all-things-considered duty in some cases but not in all. (shrink)

North .—What is the trouble about moral facts? When someone denies that there is an objective moral order, or asserts that ethical propositions are pseudo-propositions, cannot I refute him by saying: “You know very well that Brown did wrong in beating his wife. You know very well that you ought to keep promises. You know very well that human affection is good and cruelty bad, that many actions are wrong and some are right”? West .—Isn't the trouble about moral facts (...) another case of trouble about knowing, about learning? We find out facts about the external world by looking and listening; about ourselves, by feeling; about other people, by looking and listening and feeling. When this is noticed, there arises a wish to say that the facts are what is seen, what is heard, what is felt; and, consequently, that moral facts fall into one of these classes. So those who have denied that there are “objective moral characteristics” have not wanted to deny that Brown's action was wrong or that keeping promises is right. (shrink)

Mumford puts forward a new theory of dispositions, showing how central their role in metaphysics and philosophy of science is. Much of our understanding of the physical and psychological world is expressed in terms of dispositional properties--from the spin of a sub-atomic particle to the solubility of sugar. Mumford discusses what it means to say that something has a property of this kind and how dispositions can possibly be real things in the world.

George Molnar came to see that the solution to a number of the problems of contemporary philosophy lay in the development of an alternative to Hume's metaphysics. This alternative would have real causal powers at its centre. Molnar set about developing a thorough account of powers that might persuade those who remained, perhaps unknowingly, in the grip of Humean assumptions. He succeeded in producing something both highly focused and at the same time wide-ranging. He showed both that the notion of (...) a power was central and that it could serve to dispel a number of long-standing philosophical problems.Molnar's account of powers is as realist as any that has so far appeared. He shows that dispositions are as real as any other properties. Specifically, they do not depend for their existence on their manifestations. Nevertheless, they are directed towards such manifestations. Molnar thus appropriates the notion of intentionality, from Brentano, and argues that it is the essential characteristic of powers. He offers a persuasive case for there being some basic and ungrounded powers, thus ruling out the reducibility of the dispositional to the non-dispositional. However, he does allow that there are non-power properties as well as power properties. In this respect, his final position is dualistic.This is contemporary metaphysics of the highest quality. It is a work that was almost complete when its author died. It has been edited for publication by another specialist in the subject, Stephen Mumford, who has also provided an introduction that will allow non-specialists to become acquainted with the issues. David Armstrong, one of the greatest living metaphysicians and personal friend of George Molnar, has provided a Foreword. (shrink)

Moral particularists are united in their opposition to the codification of morality, and their work poses an important challenge to traditional ways of thinking about moral philosophy. Defenders of moral particularism have, with near unanimity, sought support from a doctrine they call “holism in the theory of reasons.” We argue that this is all a mistake. There are two ways in which holism in the theory of reasons can be understood, but neither provides any support for moral particularism. Moral particularists (...) are united in their opposition to the codification of morality in purely descriptive terms, but their opposition takes different forms. Sometimes particularists maintain that codifying the moral landscape is impossible. In other contexts particularists argue that moral principles are in any event unnecessary. In yet other contexts particularists contend that the codification of morality is undesirable, perhaps because it would encourage people to look less carefully at the case at hand.1 These are distinct theses, although particularists often endorse all three. As Jonathan Dancy, citing John McDowell puts it, “Particularism is at its crudest the claim that we neither need nor can see the search for an ‘evaluative outlook which one can endorse as rational as the search for a set of principles.’”2 On any interpretation, particularism poses an important challenge for traditional conceptions of moral philosophy.. (shrink)

1. Presumably the point of, say, inculcating a moral outlook lies in a concern with how people live. It may seem that the very idea of a moral outlook makes room for, and requires, the existence of moral theory, conceived as a discipline which seeks to formulate acceptable principles of conduct. It is then natural to think of ethics as a branch of philosophy related to moral theory, so conceived, rather as the philosophy of science is related to science. On (...) this view, the primary topic of ethics is the concept of right conduct, and the nature and justification of principles of behaviour. If there is a place for an interest in the concept of virtue, it is a secondary place. Virtue is a disposition to behave rightly; the nature of virtue is explained, as it were, from the outside in. (shrink)

Counterfactuals is David Lewis' forceful presentation of and sustained argument for a particular view about propositions which express contrary to fact conditionals, including his famous defense of realism about possible worlds and his theory of laws of nature.

In this essay I offer a new particularist reading of Aristotle’s Nicomachean Ethics. I argue that the interpretation I present not only helps us to resolve some puzzles about Aristotle’s goals and methods, but it also gives rise to a novel account of morality—an account that is both interesting and plausible in its own right. The goal of this paper is, in part, exegetical—that is, to figure out how to best understand the text of the Nicomachean Ethics. But this paper (...) also aims to contribute to the current exciting and controversial debate over particularism. By taking the first steps towards a comprehensive particularist reading of Aristotle’s Ethics I hope to demonstrate that some of the mistrust of particularism is misplaces and that what is, perhaps, the most influential moral theory in the history of philosophy is, arguably, a particularist moral theory. (shrink)

In this paper I assess the viability of a particularist explanation of moral knowledge. First, I consider two arguments by Sean McKeever and Michael Ridge that purport to show that a generalist, principle-based explanation of practical wisdom—understood as the ability to acquire moral knowledge in a wide range of situations—is superior to a particularist, non-principle-based account. I contend that both arguments are unsuccessful. Then, I propose a particularist-friendly explanation of knowledge of particular moral facts. I argue that when we are (...) careful to keep separate the various explanatory tasks at hand we can see that a particularist-friendly explanation of the fact that Jane knows that A is morally right might not be so difficult to come by. Moreover, I suggest that a particularist approach to explaining knowledge of particular moral facts may go some way towards discharging the challenge of moral scepticism. (shrink)

What makes some acts morally right and others morally wrong? Traditionally, philosophers have thought that in order to answer this question we must find and formulate exceptionless moral principles—principles that capture all and only morally right actions. Utilitarianism and Kantianism are paradigmatic examples of such attempts. In recent years, however, there has been a growing interest in a novel approach—Particularism—although its precise content is still a matter of controversy. In this paper I develop and motivate a new formulation of particularism (...) as a research program and I show that my formulation is not vulnerable to the most common objections to particularism. Moreover, I argue that the particularist research program shows enough promise to warrant further exploration. (shrink)

Selim Berker argues that particularists do not have a coherent notion of reasons for action because they cannot show that contributory reasons always contribute to overall reason or moral judgments in accordance with their valence. I argue that Berker fails to demonstrate that particularists cannot show this to be the case. He also wrongly assumes that they need to know this to be the case to legitimately speak of reasons for action. Furthermore, Jonathan Dancy’s account of practical reasoning explains how (...) particularists can legitimately speak of reasons for action while claiming that reasons sometimes make contributions contrary to their valence. (shrink)

This chapter sets out to distinguish the sorts of claims have been advanced under the rubric of “moral particularism,” and to sort through the insights and costs of each. In particular, it distinguishes those who are animated by suspicion of theory itself from those who aim to reconfigure — sometimes radically — the nature of theory. It defends as key the particularist insight that exceptions to substantive moral explanations are ubiquitous. It argues that the lesson of this insight is not (...) to abandon moral generalizations, but to change the picture of what they must look like to do their work. (shrink)

It is often presumed that the laws of nature have special significance for scientific reasoning. But the laws' distinctive roles have proven notoriously difficult to identify--leading some philosophers to question if they hold such roles at all. This study offers original accounts of the roles that natural laws play in connection with counterfactual conditionals, inductive projections, and scientific explanations, and of what the laws must be in order for them to be capable of playing these roles. Particular attention is given (...) to laws of special sciences, levels of scientific explanation, natural kinds, ceteris-paribus clauses, and physically necessary non-laws. (shrink)

In this article, we present an analysis of defeasible generalizations -- generalizations which are essentially exception-laden, yet genuinely explanatory -- in terms of various notions of privileged conditions. We argue that any plausible epistemology must make essential use of defeasible generalizations so understood. We also consider the epistemic significance of the sort of understanding of context that is required for understanding of explanatory defeasible generalizations on any topic.

Moral particularism, broadly understood, is the position that morality resists codification into a set of rules or principles.1 Jonathan Dancy, particularism's main contemporary proponent, maintains that there are few, if any, true moral principles, and moral reasoning and judgment do not require them. Instead, acts are justified by the salient features of particular situations, and moral reasoning requires attunement to these elements. In rejecting a rule-bound approach to morality, particularists deny pictures of moral education emphasizing knowledge and application of principles. (...) While Dancy offers a competing view of competence, his explanation of the possibility of moral education is inadequate, leaving a... (shrink)

In this work, the author has fashioned out of the logical and linguistic theses of his earlier books a full-scale but readily intelligible account of moral argument.

The Zhuangzi rejects the use of invariant general norms to guide action, instead stressing the importance of contextual factors in determining the apt course to take in particular situations. This stance might seem to present a variety of moral particularism, the view that general norms play no fundamental role in moral thought and judgment. I argue against interpreting the Zhuangzi as committed to particularism and thus denying that dao rests on, is shaped by, or comprises general patterns or norms. Instead, (...) I contend, the text presents a combination of contextualism about the factors that determine appropriate responses to particular situations and pluralism about defeasible general norms or standards. The target of criticism is not generalism, the view that general patterns and relations play a role in determining and explaining appropriate courses of action. It is the monolithic application of fixed norms without regard for context. (shrink)

Specific moral facts seem to be grounded in relevant natural facts, together with relevant moral principles. This picture—according to which moral principles play a role in grounding specific moral facts—is a very natural one, and it may be especially attractive to non-naturalist, robust realists. A recent challenge from Selim Berker threatens this picture, though. Moral principles themselves seem to incorporate grounding claims, and it’s not clear that this can be reconciled with according the principles a grounding role. This chapter responds (...) to Berker’s Challenge, utilizing a grounding pluralism. In particular, it argues that distinguishing between normative and metaphysical grounding is the key to saving the natural picture. It also shows how such a distinction is one that you have a reason to endorse independently of this challenge, as it does important work elsewhere in moral philosophy. (shrink)

For many years essentialism was considered beyond the pale in philosophy, a relic of discredited Aristotelianism. This is no longer so. Kripke and Putnam have made belief in essential natures respectable once more. Harré and Madden have argued against Hume's theory of causation and developed an alternative theory based on the assumption that there are genuine causal powers in nature. Dretske, Tooley, Armstrong, Swoyer, and Carroll have all developed strong alternatives to Hume's theory of the laws of nature. And Shoemaker (...) has developed a thoroughly non-Humean theory of properties. The "new essentialism" has evolved from these beginnings and can now reasonably claim to be a metaphysic for a modern scientific understanding of the world - one that challenges the conception of the world as comprising passive entities whose interactions are to be explained by appeal to contingent laws of nature externally imposed. (shrink)