These questions are somewhat linked but I agree with the reverter that the problem of free will is more cleanly presented without discussing the mind body problem In the added section the proposition This dualism allows humans free will because associated brain activity only is correlated with human action and is not its cause is stated in Wikipedia s voice but this is just one POV For example Simon Blackburn argues very convincingly in Think that the dilemma of determinism also applies to non physical cuasation so I m fairly certain many philosophers would disagree that monism dualism is at all relevant to the free will debate