Abstract

The free will debate is a modal one--if determinism is true, can agents ever do other than what they do? Compatibilists have tried to show that statements about what an agent could have done are deductible to statements about what she would have done if certain conditions had obtained. But recent developments in modal logic and the logic of counterfactuals provide arguments that no such analysis can succeed. There is in the literature no satisfactory reply to these arguments, and some compatibilists have retreated to the position that freedom in the sense worth wanting does not require being able to do otherwise. I argue that this retreat is both misguided and unnecessary. ;In Chapter One I examine a formal modal argument which Ginet and van Inwagen offer as a reconstruction of the reasoning that people actually use in concluding that determinism and freedom are incompatible. Although the argument has a form that is valid in the standard modal logics, I show that it is not valid for the kind of necessity at issue. ;If a causally determined agent were to do otherwise, either the past or the laws would be different. In Chapter Two I show that this does not commit the compatibilist to the claim that determined agents can change the laws or the past. ;The incompatibilist argues that deterministic laws prevent us from exercising any ability other than the one we in fact exercise. In Chapter Three I argue that abilities are a species of capacity, that capacities are not dispositions, and that determined agents are ordinarily able to exercise unexercised abilities. ;Frankfurt and Dennett claim to have counterexamples to the thesis that responsibility and the kind of freedom worth wanting require being able to do otherwise. In Chapters Four and Five I explain why their cases do not undermine the traditional debate. They are right in thinking that much of what we value about freedom is what distinguishes us from less complex parts of nature--our psychological abilities. But they are wrong in thinking that it doesn't matter whether we are able to do otherwise