Any evidence for and against free wills existence? It depends what you mean by free will. If you have read Dan Barker and Sam Harris you would get the impression that free will does not exist on the individual basis, that all of our actions are consequent of physical and psychological traits beyond our comprehension. However, Barker suggests free will in terms of a social context, that when we judge others behavior, we suppose that person had the free will to make such action. To have society without that notion would be chaos.