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The dominant moral philosophy of nineteenth century Britain was utilitarianism, beginning with Bentham and ending with Sidgwick. Though once overshadowed by his immediate predecessors in that tradition (especially John Stuart Mill), Sidgwick is now regarded as a figure of great importance in the history of moral philosophy. Indeed his masterpiece, The Methods of Ethics (1874) has been described by John Rawls as the "most philosophically profound" of the classical utilitarian works. In this volume a distinguished group of philosophers reassesses the full range of Sidgwick's work, not simply his ethical theory, but also his contributions as a historian of philosophy, a political theorist, and a reformer.

In this essay I defend the view that Henry Sidgwick’s moral epistemology is a form of intuitionist foundationalism that grants common-sense morality no evidentiary role. In §1, I outline both the problematic of The Methods of Ethics and the main elements of its argument for utilitarianism. In §§2-4 I provide my interpretation of Sidgwick’s moral epistemology. In §§ 5-8 I refute rival interpretations, including the Rawlsian view that Sidgwick endorses some version of reflective equilibrium and the view that he is committed to some kind of pluralistic epistemology. In§ 9 I contend with some remaining objections to my view.

Sidgwick’s dualism of the practical reason is the idea that since egoism and utilitarianism
aim both to have rational supremacy in our practical decisions, whenever they conflict
there is no stronger reason to follow the dictates of either view. The dualism leaves us
with a practical problem: in conflict cases, we cannot be guided by practical reason to
decide what all things considered we ought to do. There is an epistemic problem as well:
the conflict of egoism and utilitarianism shows that they cannot be both self-evident
principles. Only the existence of a just God could, for Sidgwick, prevent the conflict and
thus solve the dualism. The paper first explores in detail and rejects some reconstructions
of the dualism: a purely logical account, and accounts whereby egoism and utilitarianism
are principles of pro tanto reasons or of sufficient reasons. Then it proposes a better account,
in which egoism and utilitarianism are logically compatible and yet conflicting
principles of all things considered reason. The account is shown to fit with Sidgwick’s
view of the dualism and of its practical and epistemic pitfalls. Finally, some views are
discussed as to the wider positive significance of the dualism, regarded as a challenge to
the rational authority of morality, or as indicating the structural opposition of agentrelative
and agent-neutral reasons, or again as the imperfect yet amendable attempt at a
comprehensive pluralist theory of practical reasons.

Morality based upon categorical imperatives. On a supposed right to tell lies from benevolent motives, by I. Kant.--Utilitarian morality, by H. Sidgwick.--What makes right acts right? by Sir D. Ross.--Utilitarianism, universalisation, and our duty to be just, by J. Harrison.--Extreme and restricted utilitarianism, by J. J. C. Smart.--What if everyone did that? by C. Strang.--Toward a credible form of utilitarianism, by R. B. Brandt.

InMoral Thinking R. M. Hare offers a very influential defense of utilitarianism against intuitive objections. Hare's argument is roughly that utilitarianism conflicts with defensible moral intuitions only in unusual cases and that, in such cases, even defensible moral intuitions are unreliable. This paper reconstructs Hare's arguments and argues that they presuppose the success of his problematic proof of utilitarianism. Contrary to what many have thought, Hare's negative defense of utilitarianism against intuitive objections is not separable from his proof. In the second part of the paper I argue that Hare does not succeed in defending utilitarianism against the objection that it is too demanding. The final section of the paper sketches a substantially revised version of Hare's reply to intuitive objections. So revised, the argument is independent of Hare's proof and affords a plausible answer to the objection that utilitarianism is too demanding.

In Moral Thinking R. M. Hare offers a very influential defense of utilitarianism against "intuitive" objections. Hare's argument is roughly that utilitarianism conflicts with defensible moral intuitions only in unusual cases and that, in such cases, even defensible moral intuitions are unreliable. This paper reconstructs Hare's arguments and argues that they presuppose the success of his problematic "proof" of utilitarianism. Contrary to what many have thought, Hare's negative defense of utilitarianism against intuitive objections is not separable from his "proof". In the second part of the paper I argue that Hare does not succeed in defending utilitarianism against the objection that it is "too demanding". The final section of the paper sketches a substantially revised version of Hare's reply to intuitive objections. So revised, the argument is independent of Hare's proof and affords a plausible answer to the objection that utilitarianism is "too..

Sidgwick famously claimed that an argument in favour of utilitarianism might be provided by demonstrating that a set of defensible philosophical intuitions undergird it. This paper focuses on those philosophical intuitions. It aims to show which specific intuitions Sidgwick endorsed, and to shed light on their mutual connections. It argues against many rival interpretations that Sidgwick maintained that six philosophical intuitions constitute the self-evident grounds for utilitarianism, and that those intuitions appear to be specifications of a negative principle of universalization (according to which differential treatments must be based on reasonable grounds alone). In addition, this paper attempts to show how the intuitions function in the overall argument for utilitarianism. The suggestion is that the intuitions are the main positive part of the argument for the view, which includes Sidgwick's rejection of common-sense morality and its philosophical counterpart, dogmatic intuitionism. The paper concludes by arguing that some of Sidgwick's intuitions fail to meet the conditions for self-evidence which Sidgwick himself established and applied to the rules of common-sense morality.

Introduction -- Sidgwick's metaethics -- Sidgwick's moral epistemology -- Utilitarianism versus dogmatic intuitionism -- Utilitarianism versus egoism.