A. John Simmons

This paper argues that libertarian political philosophers, including Robert Nozick, have erred in neglecting the problem of political obligation and that they ought to embrace an actual consent theory of political obligation and state legitimacy. It argues as well that if they followed this recommendation, their position on the subject would be correct. I identify the tension in libertarian (and especially Nozick's) thought between its minimalist and its consensualist strains and argue that, on libertarianism's own terms, the consensualist strain ought to prevail. I then describe the form of the consent theory that I recommend to libertarians. The paper concludes with an extended defense of this form of consent theory against contemporary liberal-egalitarian criticisms of it (both explicit and implicit), including those of Dworkin, Rawls, and their followers. Footnotesa Earlier versions of this essay were presented at the University of Michigan, Virginia Commonwealth University, and Brown University. For their lively discussions and helpful suggestions for the improvement of this essay, I am grateful to those audiences and to my fellow contributors to this volume. And for their careful reading and comments, I thank the editors of Social Philosophy and Policy.

Anarchist political philosophers normally include in their theories (or implicitly rely upon) a vision of a social life very different than the life experienced by most persons today. Theirs is a vision of autonomous, noncoercive, productive interaction among equals, liberated from and without need for distinctively political institutions, such as formal legal systems or governments or the state. This "positive" part of anarchist theories, this vision of the good social life, will be discussed only indirectly in this essay. Rather, I want to focus here on the "negative" side of anarchism, on its general critique of the state or its more limited critique of the specific kinds of political arrangements within which most residents of modern political societies live. Even more specifically, I will center my discussion on one particular version of this anarchist critique - the version that is part of the theory now commonly referred to as "philosophical anarchism". Philosophical anarchism has been much discussed by political philosophers in recent years. But it has not, I think, been very carefully defined or adequately understood. My object here will be to clear the ground for a fair evaluation of philosophical anarchism, by offering a more systematic account of the nature of the theory and of possible variants of the theory, and by responding to the most frequent objections to the theory. I hope by this effort to present philosophical anarchism as a more attractive, or at least a less obviously flawed, political philosophy.