Sorry S but your malthusian scenario only works when there is a finite amount of resources. And how much raw material is there in the Milky Way? Or in our own asteroid belt? I would be willing to be that there is enough iron and aluminum in the belt to provide every human being on earth with at least 10 cars.

I can see it now… 15,000 years ago Grogg the Caveman freaks out because there’s not enough room in his cave for his 4th kid. But then he leaves the cave…