I liked the explanations of the various facets of evolution, of vision, especially. It was also interesting to hear what happened to plant genetics in post-World War II Russia. I didn't like the way that Carroll argued for evolution and the attacks he made on creationists. It seems to me that the facts stand on their own, and can be understood by anyone willing without being force-fed. I almost never do feel, however, that an appeal for environmentalism, as in the last chapter of this book, is misplaced, and I was horrified by the new facts there. It was especially compelling that Carrol himself says he had just found out about the statistics in the final chapter while doing the research for the book.