"Once upon a time, 4,000 to 8,000 years after humanity invented agriculture, something very strange happened to human reproduction. Across the globe, for every 17 women who were reproducing, passing on genes that are still around today—only one man did the same."
Further down: "In more recent history, as a global average, about four or five women reproduced for every one man."
The boomer generation was an anomaly because in the 1940's "everyone" (not literally) was having kids independent of ideology. Part of this was because of a vast flattening of status (the depression and shared misery of war probably had a lot to do with it).
Historically (averaging over 1000s of years) - that is abnormal; normally people are a lot more "choosy" for lack of a better word - which is what the anthropological article implies. We're moving back into a world of inequality and more intense status competition in mating - the effects of the Great Depression + World War II have worn off.
"Once upon a time, 4,000 to 8,000 years after humanity invented agriculture, something very strange happened to human reproduction. Across the globe, for every 17 women who were reproducing, passing on genes that are still around today—only one man did the same."
https://psmag.com/environment/17-to-1-reproductive-success