In this they resemble any reasonable being who does an unreasonable thing and justifies it with reasons. War, for example. My species has a great many good reasons for making war, though none of them is as good as the reason for not making war. Our most rational and scientific justifications-for instance, that we are an aggressive species-are perfectly circular: we make war because we make war. Our justifications for making a particular war (such as: our people must have more land and more wealth, or: our people must have more power, or: our people must obey out deity's orders to crush the sacrilegious infidel) all come down to the same thing: we must make war because we must. We have no choice. We have no freedom. This argument is not ultimately satisfactory to the reasoning mind, which desires freedom.