A simple Google search will tell you that there are at least 26,000 non-profit organizations dedicated to ending war, some of them follow:

Peace & Anti-War Links

A Future without War

Peace-Action.org
Protest.net
American Friends Service Committee
Global Exchange
AntiWar.com
Common Dreams News Center
Independent Media Center
Peace, No War
Resource Center for Nonviolence
International Action Center
Peace Pilgrim
Cape Codders For Peace & Justice
Grandmothers for Peace
Jeannette Rankin Peace Center

Random Links Driving spiders crazy since 1995
prohibition legalization religions require beards AMISH Rainbow farms fbi hydroponics debates who vote for issues for real people Earth war war on drugs pay it forward activist starts here end all wars when Jamie Lynn Carlin Lexa Mars Quantum Leap ward marijuana recipes cooking heating weeds grass skunk smoking quiff squabble mojo rising 8k.com feedreeder 8k race run ganja ours Walking extra meat Virginia brad forbidden truth summer solstice Lost as a blind eagle government constitutional Convention admits to smoking sick to the future quiet resolve of my ego change the games