Starts with a Bang asks "If you took all the people on Earth, and you spread every one of us -- men, women, and children -- out as sparsely as possible over the entire land area of Earth, including land like Antarctica, Greenland, and Siberia, how much land would everyone get? How far away would your neighbors be?"
Think about it for a minute and then look up the answer. I was way way wrong. Scary stuff, which proves that what Malthus wrote more than 200 years ago still applies today even though birthrates are dropping in the western world, the areas where food is actually scarce do not seem to benefit from modern knowledge about contraception.
Comedian Sarah Silverman has a novel approach to food shortages though: sell the vatican, build a nice house for yourself with pools and whatnot, use what's left over to feed the world.
Of course the above clip is comedy, give a man a fish and he will be fed for a day, teach a man how to fish and he will feed himself for life, as the saying goes. Problem is being able to fish means little if there's simply too many people around you going hungry, pretty soon you'll have emptied the lakes and oceans. Which is where we are heading now.
On the other hand maybe birth control will finally be accepted in the poorest countries when the delusional dictator in the Vatican is gone.