How do you stop others from producing weapons though? Let's say you get USA, China, Russia, Brazil, Israel, etc to agree to destroy all weapons. Get rid of guns, mines, and so on. How do you keep a terrorist cell in Pakistan with a bunch of tanks from conquering India?

But what's interesting is that the Geneva Convention has made practically every kind of warfare a war crime. And it seems to have worked (besides the terrorism bit).

We can probably stand to get rid of the more war-crimish weapons, like fire bombs and land mines. I think planes and carriers are such a large cost, that they've been labeled white elephants. But the last time we had a major war, the US managed to send planes all over the Pacific and rescue a lot of people from torture and rape.