Myself. That would be the easiest way, but if you should kill World War, doesn't that mean World Peace and a more likely way to find and a "cure" for world hunger.
But a lot of people make their money off of war. So if we get rid of war at all, every one in every army would loose their jobs.
But we would save a lot of tax money.
If we would kill hunger... we would still kill each other over a lot of different things.
But I also have to think of MGS4, which leads to a Powerpuff Girls song: "War, War, War, WAR , WAR! Warwarwar, keeps the world go round."
I'll have to think over this one and come back.