What makes us human? What, if anything, sets us apart from all other creatures? Ever since Charles Darwin's theory of evolution, the answer to these questions has pointed to our own intrinsic animal nature. Yet the idea that, in one way or another, our humanity is entangled with the non-human has a much longer and more venerable history. In the West, it goes all the way back to classical antiquity. This grippingly written and provocative book boldly...