True. So we work for three years, eh? More seriously, you're correct that population pressure is one of the main problems that could derail a techno-utopian s

True. So we work for three years, eh? More seriously, you're correct that population pressure is one of the main problems that could derail a techno-utopian scenario. Fortunately, population seems to be leveling off. I like to joke that the Amish are the "meek" who will "inherit the earth", as they are fantastic farmers and still have large families. But there's an element of truth to the joke: if most folks stop increasing their own population, but a few (like the Amish) don't, then in the fullness of time they would eventually, uh, overrun the rest of us regardless of any particular technological change.