As much as we owe the nature of our current existence to the evolutionary forces Darwin first discovered, or to the cultures we grow up in, or to the chemical states affecting our brain processes at any given moment, none of this impacts on our freedom. I am free because neither science nor religion can ever tell me, with certainty, what my future will be and what I should do about it. The dictum from Sartre that Strawson quoted thus gets it exactly right: I am condemned to freedom. I am not free because I can make choices, but because I must make them, all the time, even when I think I have no choice to make.