Nice try at whining, lib-style. However Ann devoted a third of her book to the subject, and the reviewer also covered it prominently. Can't put it out of bounds, I'm afraid.
As a topic, "darwinism" seems kind of out of place in that book. I am curious whether ann decided to add an evolution section before deciding the book's main theme, or after. I have a hunch that she added the evolution section not because it's an issue she thought was important (she hasn't mentioned it ever before afaik), but because such a religious-political flashpoint issue fit the tongue-in-cheek theme of liberalism being a religion. However I have no idea why she let it take up a whole third of the book.