The 'social brain hypothesis' is now the standard theory to the question ' why people are so smart?'. Why did our ancestor evolve in such a way that their average intelligence increase over time? The solution comes from increasing social complexity. As human society become more, and more complex, there is a demand for higher intelligence. Specifically, according to the article( below), there is a demand for "tactical deception", and "coalition formation".
http://psych.colorado.edu/~tito/sp03/7536/Dunbar_1998.pdf
So, what exactly is lying, and having a lot of friends help reproduction?
How does this explain people who does not have a large number of friends, and are completely honest?
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