Recent paper (h/t @whyvert).
Kim, Yuri, and James J. Lee. 2018. “The Genetics of Human Fertility.” Current Opinion in Psychology 27 (August): 41–45.
There’s basically two classes of people having more kids:
Overall, there is a suggestion of two different reproductive strategies proving to be successful in modern Western societies:
(1) a strategy associated with socially conservative values, including a high commitment to the bearing of children within marriage; and
(2) a strategy associated with antisocial behavior, early sexual experimentation, a variety of sexual partners, low educational attainment, low commitment to marriage, haphazard pregnancies, and indifference to politics. [AK: I.e., the People of Walmart]
Interesting to see who will win out by the time of the Age of Malthusian Industrialism. (Certainly the former would be more successful if/when Malthusian conditions return).