[Stormer]

One of the UN's population prediction scenarios see the world population beginning to fall by mid-century. I think this is realistic. Birthrates are below replacement in most big countries including Europe, the U.S., China, Brazil, Russia, Japan... Poor countries face either disaster (war/famine) or progress (which always means falling birthrates). For example, demographers are predicting Nigeria will have nearly a billion people by the end of the century. Not a chance.