So active fathers, male-female pair-bonds, male sexual jealousy, and big-headed babies all co-evolved--that is, arose gradually but together. #JonathanHaidt

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By the end of [1950s], the average marriage age of women in America dropped to 20, and was still dropping, into the teens. [14M] girls were engaged by 17. The proportion of women attending college in comparison with men dropped from [47%] in 1920 to [35%] in 1958. #BettyFriedan

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By the end of [1950s], the average marriage age of women in America dropped to 20, and was still dropping, into the teens. [14M] girls were engaged by 17. The proportion of women attending college in comparison with men dropped from [47%] in 1920 to [35%] in 1958. #BettyFriedan — English Quotes (@english_quotes) Jul 24, 2026
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