Large Human Brain evolves from sizing each other up

I found this article fascinating.

Date: August 12, 2016

Source: Cardiff University Summary:

Humans have evolved a disproportionately large brain as a result of sizing each other up in large cooperative social groups, researchers have proposed.
A team led by computer scientists at Cardiff University suggest that the challenge of judging a person’s relative standing and deciding whether or not to cooperate with them has promoted the rapid expansion of human brain size over the last 2 million years.
In a study published in Scientific Reports, the team, which also includes leading evolutionary psychologist Professor Robin Dunbar from the University of Oxford, specifically found that evolution favors those who prefer to help out others who are at least as successful as themselves.
Lead author of the study Professor Roger Whitaker, from Cardiff University’s School of Computer Science and Informatics, said: “Our results suggest that the evolution of cooperation, which is key to a prosperous society, is intrinsically linked to the idea of social comparison — constantly sizing each up and making decisions as to whether we want to help them or not.
“We’ve shown that over time, evolution favors strategies to help those who are at least as successful as themselves.”

Read the remaining post at

https://www.sciencedaily.com/releases/2016/08/160812074537.htm#.V8L9Fth1lPI.linkedin