The goal of the book is admirable. In the early part of the book it is well documented with citations. As it moves to more modern examples the authors just get the facts wrong I think to prove a point.
The best example is the 9/11 hitchackers none fit his profile. Another example would be the the idea after 9/11 to ignore or not repsond to the attack. He fails to "recall" the number of attacks we did not respond to before 9/11 so the time between decrease but the deaths increased with each.
The value is the understanding of male and female groups he based on chimp studies. That was useful and well done.
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