We like to think of ourselves as enjoying unrestricted freedom of the will. But modern science increasingly teaches us that our choices are causally determined by some combination of our genes, our upbringing, and our present circumstances. Can the idea of freedom of the will be reconciled with the scientific outlook or is free will an illusion? If we give up on the idea that we have freedom, what follows for our practice of holding people morally responsible for their actions and choices? John and Ken talk freely with John Fischer from UC Riverside, co-author of Four Views on Free Will.