Out of the chaos of civil war, Indian wars and duels of a hundred years ago has come order. Mechanisms have been set up to avoid physical violence while psychological violence still endures. The smaller units, the states, have given up to the larger unit, the United States, the right to make war. Yes, I think the time will come when the smaller units, the nations, will give up to the larger unit, the United Nations, one single right - the right to make war. I don't believe nations would or should give up other rights.
People have the most control over their affairs at a grass-roots level.
Anything that can be fairly and efficiently handled at a grass-roots level should be thus handled, and only delegated to a higher authority when necessary. The United Nations would have as its job maintaining a peaceful situation in the world. As long as we are as immature as we are it would have a police force to deal with individual offenders against the peace of the world - removing them, I would hope, for their rehabilitation. Also it should have an unarmed peace force to deal with war prevention. While our nation can deal with problems like an inadequate food supply, they would have to deal with problems like a country striving for freedom - and freedom is now the desire of all human hearts.