Tamler Sommers

1. “All Theory is Against Free Will…” Powerful arguments have been leveled against the concepts of free will and moral responsibility since the Greeks and perhaps earlier. Some—the hard determinists—aim to show that free will is incompatible with determinism, and that determinism is true. Therefore there is no free will. Others, the “no-free-will-either-way-theorists,” agree that determinism is incompatible with free will, but add that indeterminism, especially the variety posited by quantum physicists, is also incompatible with free will. Therefore there is no free will. Finally, there are the a priori arguments against free will. These arguments conclude that it makes no difference what metaphysical commitments we hold: free will and ultimate moral responsibility are incoherent concepts. Why? Because in order to have free will and ultimate moral responsibility we would have to be causa sui, or ‘cause of oneself.’ And it is logically impossible to be self-caused in this way. Here, for example, is Nietzsche on the causa sui

This paper develops a sympathetic critique of recent experimental work on free will and moral responsibility. Section 1 offers a brief defense of the relevance of experimental philosophy to the free will debate. Section 2 reviews a series of articles in the experimental literature that probe intuitions about the "compatibility question"—whether we can be free and morally responsible if determinism is true. Section 3 argues that these studies have produced valuable insights on the factors that influence our judgments on the compatibility question, but that their general approach suffers from significant practical and philosophical difficulties. Section 4 reviews experimental work addressing other aspects of the free will/moral responsibility debate, and section 5 concludes with a discussion of avenues for further research.