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It's explained with https://en.wikipedia.org/wiki/R/K_selection_theory https://en.wikipedia.org/wiki/R/K_selection_theory - people have fewer kids now, and are
by ars 5y ago
It's explained with https://en.wikipedia.org/wiki/R/K_selection_theory https://en.wikipedia.org/wiki/R/K_selection_theory - people have fewer kids now, and are more careful with each.