“Knowledge is usually considered a better basis for policy than ignorance,” Nicholas Wade concludes, in A Troublesome Inheritance: Genes, Race and Human History, but I doubt many liberal creationists — as Steve Sailer calls them — will agree, when the knowledge looks like this:
European cultures tried to keep population below the famine level by inculcating the sexual restraint and romantic choosiness conducive to relatively late marriages, while East Asian cultures cultivated grinding work ethics. In most of tropical Africa, however, the infectious disease burden was so lethal that dense populations could not be achieved due to epidemics. So the population could not form cities, nor even fully farm the countryside. The big danger in Africa was not Malthusian overpopulation, but underpopulation, which may account for how sexualized their cultures are.
Not surprisingly, each continent’s culture seems to have bred people befitting its environment, and their traits live on in their descendants in modern America.