It helped in the 60's it can help again.
But realistically as long as we have a neocon in the white house we're going to go to war. The great Nobel Peace prize winner now has us involved in how many wars?
If you want peace try Ron Paul if you're conservative. If you're liberal try getting Dennis Kucinich to run. I would vote for either one even though I'm a libertarian just to have some peace for a change.