||Compatibilism was influentially defended by Hume 1955 and Hobbes 1651. Hume defended the conditional analysis of the ability to do otherwise. Hobart 1934 argued that free will actually requires determinism to be true. Non-traditional compatibilist accounts stem fromFrankfurt 1969, which argues that alternative possibilities are not required for moral responsibility (and, presumably, freedom). In Frankfurt 1971, an influential hierarchical account of free will is defended. Strawson 1962 develops an account of free will on which agents' reactive attitudes towards others is central. Very recently, there has been a rival of something like a conditional analysis of freedom, inspired by Lewisian work on dispositions; Vihvelin 2004 is an excellent defence of the view.