The overall objective of my current researches is to formulate and defend a variant of contractarian moral and social theory. Only a contractarian theory is, I claim, compatible with—and indeed required by—the theory of rational choice. I say “a variant” of contractarian theory because, for reasons I sketch in my paper “The Social Contract as Ideology”, there is a deep danger inherent in contractarian theory, the danger that it may be supposed that all human relationships are to be rationalized as contractual. The prevalence of this view—and it is, I believe, increasingly prevalent—would return us to the natural condition of humankind envisaged by Thomas Hobbes, the war of all against all. But this is contractarianism carried to excess; I want to argue, although assuredly not here, that satisfaction of a contractarian requirement is not only rationally necessary, but also necessary if our moral and social practices are to yield that true and complete human sociability integral to any life worth living, and fundamental to a community of free and equal persons.