VERY interesting! Gets you thinking,
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This review is from: How Many Friends Does One Person Need?: Dunbar's Number and Other Evolutionary Quirks (Kindle Edition)
This book was a really good read.
If you like deep thought provoking articles regarding human behaviour, evolution, evolution psychology, anthropology, religion, why belief systems don't work and other high octane subjects, then this is a good read!
For weeks afterwards it kept me thinking about why things are the way they are.