This is a robust and careful debate about free will, how it interacts with determinism and indeterminism, and whether we have it or not. Providing the most up-to-date account of four major positions in the free will debate, the second edition of this classic text presents the opposing perspectives of renowned philosophers John Martin Fischer, Robert Kane, Derk Pereboom, and Manuel Vargas. Substantially revised throughout, this new volume contains eight in-depth chapters, almost entirely rewritten for the new edition.