He's right. Look at Africa, mostly inhabited by black people compared to South Africa which is mostly white.
hm
you know what else is different between south africa and north africa?
not south africa:

south africa:

it's almost as if habitability aids development....
nah, that idea doesn't make sense. nevada is the industrial center of the united states, spain is the technological core of europe, and iraq is the most advanced middle eastern country.
oh wait.