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More Data Have Relegated The Importance Of The “Social Brain Theory,” Which States That We Have Bigger Brains Because We Are Social Animals. The Relegation Is Due To Recent Data Analysis That Points To Our Diet As The Primary Reason For Our Bigger Brains. Better Keep Watching Your Diet, Folks, If You Know What I Mean.

BBC – Earth – A change in diet may have helped our brains get so big

http://www.bbc.com/earth/story/20170327-why-our-brains-grew-so-big

Many anthropologists think that living in large social groups drove the evolution of bigger brains, but new findings call that into question