“A truer statement hasn’t been uttered: “Our “groupiness” shapes human history”.  Mark Moffett says this from his standpoint as an expert on ants, including the Argentine ant, a society of billions:  they live peacefully within their own colony but cross a physical line and it’s a blood bath.  Moffett’s book is a wide-ranging, deeply interesting analysis of how large numbers of individual agents become a society.  His travels in the world and through vast intellectual landscapes give him a unique view of why we are the way we are, both in our similarity to other living beings and our differences from them – our ability to include once alien groups into our own, for example.  There is no other book I’ve read recently that made my neurons pop at the rate this book did.” 
—Mahzarin Banaji, chair of psychology at Harvard and author of Blindspot