There's plenty of room in countries all over the world, if not in every individual community. We don't have a global overpopulation problem, we have a resource overconsumption problem, which, as CellBioGuy noted, is more concentrated in first world countries than third world.

The solution is not necessarily to reduce consumption, since many material limitations might be circumvented by technological means, but as it stands people in the first world still contribute more to the existing problem than people elsewhere.