It's an interesting but light read. It seems to me that the tone doesn't need to be so confrontational, but if you can ignore that, it's okay.
When you get to the part about how Jane Goodall's original study of chimpanzees was flawed, I feel I should point out that I saw her talk on TV once several years ago, and she said that if she were to go back and do it again, she would specifically have not interfered with the chimps.
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Sex at Dawn