[mrkramer]

Yea it is tragedy of the commons; even people in Medieval Europe understood they need to have a lot of children because agricultural workforce, craftsmen workforce, army size, priesthood size, taxpayers size and like you said in general to exist and inhabit some land. Because land without people was and is attractive prey in the eyes of invaders and conquerors.

[nicbou]

Europe can now suck people up from other countries, and only pick the ones that have potential to pay taxes.