Philip Pettit

Aggregating sets of judgments : an impossibility result

Suppose that the members of a certain group each hold a rational set of judgments on some interconnected questions. And imagine that the group itself now has to form a collective, rational set of judgments on those questions. How should it go about dealing with this task? We argue that the question raised is subject to a difficulty that has recently been noticed in discussion of the doctrinal paradox in jurisprudence. And we show that there is a general impossibility theorem that that difficulty illustrates. Our paper describes this impossibility result and provides an exploration of its significance. The result naturally invites comparison with Kenneth Arrows famous theorem (Arrow, 1963 and 1984; Sen, 1970) and we elaborate that comparison in a companion paper (List and Pettit, 2002).

The common mind : an essay on psychology, society, and politics

Pettit argues for an original way of marking off thinking subjects, in particular human beings, from other intentional systems, natural and artificial.

In Defense of Explanatory Ecumenism

Many of the things that we try to explain, in both our common sense and our scientific engagement with the world, are capable of being explained more or less finely: that is, with greater or lesser attention to the detail of the producing mechanism. A natural assumption, pervasive if not always explicit, is that other things being equal, the more finegrained an explanation, the better. Thus, Jon Elster, who also thinks there are instrumental reasons for wanting a more fine-grained explanation, assumes that in any case the mere fact of getting nearer the detail of production makes such an explanation intrinsically superior: “a more detailed explanation is also an end in itself” (Elster 1985, p. 5). Michael Taylor (1988, p. 96) agrees: “A good explanation should be, amongst other things, as fine-grained as possible.”

Joint actions and group agents

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.

Freedom in Belief and Desire

People ordinarily suppose that there are certain things they ought to believe and certain things they ought not to believe. In supposing this to be so, they make corresponding assumptions about their belief-forming capacities. They assume that they are generally responsive to what they think they ought to believe in the things they actually come to believe. In much the same sense, people ordinarily suppose that there are certain things they ought to desire and do and they make corresponding assumptions about their capacities to form desires and act on them. We chart these assumptions in this paper and argue that they entail that people are responsible and free on two fronts. They are free and responsible believers, and free and responsible desirers.

Keeping Republican Freedom Simple: On a Difference with Quentin Skinner

There has recently been a good deal of interest in the republican tradition, particularly in the political conception of freedommaintainedwithin that tradition. I look here at the characterisation of republican liberty in a recent work of Quentin Skinner and argue on historical and conceptual grounds for a small amendment—a simplification—that would make it equivalent to the view that freedom in political contexts should be identified with nondomination.

Hope and Its Place in Mind

People may have open minds on whether a life-extending drug or technology is going to be developed before their sixties and may strongly desire that development. Do they therefore hope that it occurs? Do they hope for it in the substantive sense of “pinning their hopes” on the development? No, they do not. Hoping for a prospect in that sense certainly presupposes having an open mind on whether it will occur and having a desire for its occur-rence. But, more crucially, it means investing the prospect with a characteristic, galvanizing, and orientating role: it involves setting aside doubts about the possible nonoccurrence of the prospect and acting accordingly. This article offers a characterization of hope in that substantive sense and argues both that it can be rational and that it is ubiquitous.

The hidden economy of esteem

A generation of social theorists have argued that if free-rider considerations show that certain collective action predicaments are unresolvable under individual, rational choice – unresolvable under an arrangement where each is free to pursue their own relative advantage – then those considerations will equally show that the predicaments cannot be resolved by recourse to norms (Buchanan, 1975, p. 132; Heath, 1976, p. 30; Sober and Wilson, 1998, 156ff; Taylor, 1987, p. 144). If free-rider considerations explain why people do not spontaneously keep the streets clean, though they would each prefer unlittered streets, then those considerations will also explain why there is no effective norm against littering the streets.

Unveiling the Vote

The case for secrecy in voting depends on the assumption that voters reliably vote for the political outcomes they want to prevail. No such assumption is valid. Accordingly, voting procedures should be designed to provide maximal incentive for voters to vote responsibly. Secret voting fails this test because citizens are protected from public scrutiny. Under open voting, citizens are publicly answerable for their electoral choices and will be encouraged thereby to vote in a discursively defensible manner. The possibility of bribery, intimidation or blackmail moderates this argument but such dangers will be avoidable in many contemporary societies without recourse to secrecy.

A Republican Law of Peoples

Assuming that states will remain a permanent feature of our world, what is the ideal that we should hold out for the international order? An attractive proposal is that those peoples that are already organized under non-dominating, representative states should pursue a twin goal: first, arrange things so that they each enjoy the republican ideal of freedom as non-domination in relation to one another and to other multi-national and international agencies; and second, do everything possible and productive to facilitate the representation of less fortunate peoples in non-dominating states and to incorporate them in a non-dominating international order. This republican ideal stands midway between a utopian ideal of cosmopolitan justice and a sceptical ideal of non-intervention. The article explores its attractions and the broad institutional measures that it would support.