The argument that having five girls for every boy would be better for the species is new to me.
I’ve seen it in a lot of places; it works better for species where male parental investment is minimal (which isn’t as true for humans). Even then, the “good of the species” math and the “good for my line” math point in different directions.
I’ve seen it in a lot of places; it works better for species where male parental investment is minimal (which isn’t as true for humans). Even then, the “good of the species” math and the “good for my line” math point in different directions.