Returning to WWII isn't going to do anything useful, even if you do want to go down this intellectual rabbit-hole. I've actually looked into this before.
Go look at how many people died in WWII. Was it a lot? In absolute numbers, sure. As a percentage of the human race? No, not really. It barely made a dent in the worldwide population. You can look at population graphs over time, and it barely registers, if at all. Remember, WWI also killed a lot of people, but more people died from the Spanish Flu pandemic.
I'm sorry, but war just isn't a very good form of population control any more. Maybe it was in Medieval times, but it isn't now. Even with the horrific numbers of dead, it's just not that much of the overall population, and the amount of destruction it wreaks on everything is insane: cities leveled, resources wasted on building war materiel, and of course the ridiculous amount of oil burned (which just makes the global warming problem that much worse). Modern militaries are huge consumers of oil when they're deployed.
Go look at how many people died in WWII. Was it a lot? In absolute numbers, sure. As a percentage of the human race? No, not really. It barely made a dent in the worldwide population. You can look at population graphs over time, and it barely registers, if at all. Remember, WWI also killed a lot of people, but more people died from the Spanish Flu pandemic.
I'm sorry, but war just isn't a very good form of population control any more. Maybe it was in Medieval times, but it isn't now. Even with the horrific numbers of dead, it's just not that much of the overall population, and the amount of destruction it wreaks on everything is insane: cities leveled, resources wasted on building war materiel, and of course the ridiculous amount of oil burned (which just makes the global warming problem that much worse). Modern militaries are huge consumers of oil when they're deployed.