Check out this video by National Geographic that displays how our population has grown and some of the problems we face. My favourite part: standing shoulder to shoulder, 7 billion people would only fill Los Angeles. It’s not space that’s the problem, it’s balance. 

I think a hundred years from now the ideal population, contrary to current trendy thinking, would not be a small population but a massive one. Far more massive then most people imagine being possible. The more humans the better things will be.