This rapid somatic growth may have caused physical and mental stress to our adolescent human ancestors.

The appearance of childhood and adolescence requires the care and co-parenting of children by individuals other than their fathers and parents. As a result, the human-specific social organizations of “family” and “community” were born, as well as “sympathy.”

■References (Books, papers, Web articles, etc.)
『家族進化論』　第5章・第1節　ダーウィンの難問　　山極寿一　（東京大学出版会、2012）
「こころの起源―共感から倫理へ」　　山極寿一（『＜こころ＞はどこから来て、どこへ行くのか』所収　pp.155～200　　河合俊雄・中沢新一・広井良典・下條伸輔・山極寿一　（岩波書店、2016））

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■The References list of “Evolution of Human Sociality”