Well, of course anything is possible. But it's just as likely the population will already be dropping when we expect it to be merely leveling off. One thing i

Well, of course anything is possible. But it's just as likely the population will already be dropping when we expect it to be merely leveling off. One thing is certain, though - the rate of population growth is slowing, and has been for some time. In terms of a major war or invention, the way I see it these things are more likely to decrease the world population instead of increasing it.