If the numbers are correct (and there seems little doubt about it) we could probably double or triple the population. All we would need to do is get rid of the few rich and super rich assholes who, according to research, are responsible for most of the ressources we burn. A private jet, a couple of cars, a property with a large pool, a few guest rooms and a golf course near the beach where the luxury yacht anchors, always ready to go? Well - you probably get the idea...