In his recent book The Natural Selection of Autonomy, Bruce Waller defends a view that he calls “natural autonomy.” This view holds that human beings possess a kind of autonomy that we share with nonhuman animals, a capacity to explore alternative courses of action, but an autonomy that cannot support moral responsibility. He also argues that this natural autonomy can provide support for the ethical principle of noninterference. I argue that to support the ethical principle of noninterference Waller needs either (...) a libertarian or a compatibilist theory of autonomy. I then go on to argue that, contra Waller, the libertarian view is both compatible with Darwinism and able to make sense of how autonomous acts belong to the agents who perform them. Thus, I conclude that the libertarian position is a live option for Darwinians. If however, naturalism is taken to include a deterministic view of the universe (at least at the nonquantum level), as is often the case, then my article takes some strides in defending “Darwinian non–naturalism.”. (shrink)