We have enough clean water, (potential) power, food, and space to keep many times the earth's current population healthy and happy. The issue is that those thin

We have enough clean water, (potential) power, food, and space to keep many times the earth's current population healthy and happy. The issue is that those things are not distributed in the same amounts and places as people. While unimaginably difficult, this is a substantially easier problem to solve than choosing some people who can't reproduce.