 In the 1960s, three major contributions to the free will debate radically altered it. One was an incompatibilist argument that put crisply the intuition that a determined agent lacks control over alternatives. This argument, first developed by Carl Ginet, came to be known as the Consequence Argument (Ginet 1966). Another contribution was Harry Frankfurt’s argument against the Principle of Alternative Possibilities (PAP), a principle stating that an agent is morally responsible for what she does only if she can do otherwise (Frankfurt 1969). Finally, P.F. Strawson defended compatibilism by inviting both compatibilists and incompatibilists to attend more carefully to the central role of interpersonal relationships and the reactive attitudes in understanding the concept of moral responsibility (Strawson 1962). Each of these contributions changed dramatically the way that the free will problem is addressed in contemporary discussions. No account of free will, compatibilist or incompatibilist, is advanced today without taking into account at least one (if not more) of these three pieces.