First you need to
1) Organise world peace and achieve stability at all borders
2) Find out a way of convincing leaders of all countries that there is not going to be any more war against their country.

May I suggest that you start by campaigning for withdrawal of US troops from Afghanistan and Iraq. As an American voter and citizen that's an area where you can make a difference. Next, campaign for the US withdraw it's bases from places like Korea and Europe. Next, try to find a solution to the Israel question.