p_man

»8:45 each weekday morning, I drop off my four-year-old at preschool, hug him goodbye, and drive back home». Well, in that case it wouldn’t be a challenge at all for us. Here kindergarten and schools are closed, and it’s quite a challenge to produce full workdays whilst taking care of two little ones at home.

One reason could be that less intelligent people on average get more kids. Especially here in Norway where you get generous support from the government for child care. https://www.amazon.com/s?k=9781845409852

Of course. Fractional scaling.