I defend the following version of the ought-implies-can principle: (OIC) by virtue of conceptual necessity, an agent at a given time has an (objective, pro tanto) obligation to do only what the agent at that time has the ability and opportunity to do. In short, obligations correspond to ability plus opportunity. My argument has three premises: (1) obligations correspond to reasons for action; (2) reasons for action correspond to potential actions; (3) potential actions correspond to ability plus opportunity. In the (...) bulk of the paper I address six objections to OIC: three objections based on putative counterexamples, and three objections based on arguments to the effect that OIC conflicts with the is/ought thesis, the possibility of hard determinism, and the denial of the Principle of Alternate Possibilities. (shrink)

We citizens of the affluent countries tend to discuss our obligations toward the distant needy mainly in terms of donations and transfers, assistance and redistribution: How much of our wealth, if any, should we give away to the hungry abroad? Using one prominent theorist to exemplify this way of conceiving the problem, I show how it is a serious error — and a very costly one for the global poor.

l. There is an antinomy in Hare's thought between Ought-Implies-Can and No-Indicatives-from-Imperatives. It cannot be resolved by drawing a distinction between implication and entailment. 2. Luther resolved this antinomy in the l6th century, but to understand his solution, we need to understand his problem. He thought the necessity of Divine foreknowledge removed contingency from human acts, thus making it impossible for sinners to do otherwise than sin. 3. Erasmus objected (on behalf of Free Will) that this violates Ought-Implies-Can which he (...) supported with Hare-style ordinary language arguments. 4. Luther a) pointed out the antinomy and b) resolved it by undermining the prescriptivist arguments for Ought-Implies-Can. 5. We can reinforce Luther's argument with an example due to David Lewis. 6. Whatever its merits as a moral principle, Ought-Implies-Can is not a logical truth and should not be included in deontic logics. Most deontic logics, and maybe the discipline itself, should therefore be abandoned. 7. Could it be that Ought-Conversationally-Implies-Can? Yes - in some contexts. But a) even if these contexts are central to the evolution of Ought, the implication is not built into the semantics of the word; b) nor is the parallel implication built into the semantics of orders; and c) in some cases Ought conversationally implies Can, only because Ought-Implies-Can is a background moral belief. d) Points a) and b) suggest a criticism of prescriptivism - that Oughts do not entail imperatives but that the relation is one of conversational implicature. 8. If Ought-Implies-Can is treated as a moral principle, Erasmus' argument for Free Will can be revived (given his Christian assumptions). But it does not 'prove' Pelagianism as Luther supposed. A semi-Pelagian alternative is available. (shrink)

The Herald of Free Enterprise, a ferry operating in the English Channel, sank on March 6, 1987, drowning nearly two hundred people. The official inquiry found that the company running the ferry was extremely sloppy, with poor routines of checking and management. “From top to bottom the body corporate was infected with the disease of sloppiness.”1 But the courts did not penalize anyone in what might seem to be an appropriate measure, failing to identify individuals in the company or on (...) the ship itself who were seriously enough at fault. As one commentator put it, “The primary requirement of finding an individual who was liable . . . stood in the way of attaching any significance to the organizational sloppiness that had been found by the official inquiry.”2 In a case like this it can make good sense to hold that while the individuals involved may not bear a high degree of personal responsibility, together as a corporate enterprise they should carry full responsibility for what occurred. Although the members may not fully satisfy the conditions for being held personally responsible—although there are mitigating circumstances that excuse them in some mea-. (shrink)

University of Cologne, Germany Joint action and group agency have emerged as focuses of attention in recent social theory and philosophy but they have rarely been connected with one another. The argument of this article is that whereas joint action involves people acting together to achieve any sort of result, group agency requires them to act together for the achievement of one result in particular: the construction of a centre of attitude and agency that satisfies the usual constraints of consistency (...) and rationality in adequate measure. The main discovery in the recent theory of group agency is that this result is not easily achieved; no regular voting procedure will ensure, for example, that a group of individually consistent agents will display consistency in group judgments. Key Words: groups • group agents • collective agents • joint action • joint intention. (shrink)

This volume is devoted to Lewis's work in ethics and social philosophy. Topics covered include the logic of obligation and permission; decision theory and its relation to the idea that beliefs might play the motivating role of desires; a subjectivist analysis of value; dilemmas in virtue ethics; the problem of evil; problems about self-prediction; social coordination, linguistic and otherwise; alleged duties to rescue distant strangers; toleration as a tacit treaty; nuclear warfare; and punishment. This collection, and the two preceding volumes, (...) will disseminate more widely the work of an eminent and influential contemporary philosopher. (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.

No one is excused from doing what he ought to do merely because he is unwilling to do it. But what if others are unwilling to play their necessary role in some joint venture that you all ought to undertake: might that excuse you from doing what you yourself ought to do as part of that? It would, if you were genuinely willing to play your necessary part if they were. But the unwillingness of everyone involved cannot reciprocally serve to (...) excuse one another from doing what they ought to do. (shrink)

Many paradoxes have been revealed in the theory of democracy over the years. This article points to yet another paradox at the heart of democracy, whether in its aggregative or deliberative form.The paradox is this: If you are dealing with a large and heterogeneous community, in which people's choices are menu-sensitive in diverse ways, and if people's cognitive capacities preclude them from considering all items on a large menu simultaneouslythen individuals’ choices may be unstable and manipulable depending on how choices (...) over cognitively-manageable subsets of the menu are partitioned and sequenced, 1 and the collective choice may be likewise unstable and manipulable in consequence.Aggregative democracy casts this argument in terms of ‘alternatives’ on the menu for choice. Deliberative democracy casts this argument in terms of ‘considerations’. The same formal problem arises in both cases. (shrink)

Plausibly, only moral agents can bear action-demanding duties. This places constraints on which groups can bear action-demanding duties: only groups with sufficient structure—call them ‘collectives’—have the necessary agency. Moreover, if duties imply ability then moral agents (of both the individual and collectives varieties) can bear duties only over actions they are able to perform. It is thus doubtful that individual agents can bear duties to perform actions that only a collective could perform. This appears to leave us at a loss (...) when assigning duties in circumstances where only a collective could perform some morally desirable action and no collective exists. But, I argue, we are not at a loss. This article outlines a new way of assigning duties over collective acts when there is no collective. Specifically, we should assign collectivisation duties to individuals. These are individual duties to take steps towards forming a collective, which then incurs a duty over the action. I give criteria for when individuals have collectivisation duties and discuss the demands these duties place on their bearers. (shrink)