Some years ago, I resolved to organize my books. There were a lot of them, acquired over a few decades spent on three continents, and I wanted a system where I could readily locate any volume I pleased. As any librarian would have warned me, quandaries quickly arose. I could try to sort philosophy books into metaphysics and epistemology, on the one hand (alphabetized by author within the topic), and political and moral philosophy, on the other. But this did no favors to books about moral epistemology. Should books on anthropological theory go with anthropology, or did they consort more naturally with cultural theory? . . .