[sn0v]

A positive contribution to society and a positive contribution to the planet aren't necessarily the same. Sure, more intellectuals mean faster societal development. That doesn't take away from the pressure an increased population places on our limited natural resources.

[ahomescu1]

GP isn't saying "we should have more intellectuals", he/she is saying "we should have more people because that way we get more intellectuals". IMHO it's a big difference.