Damon, alongside George Clooney, Brad Pitt, Don Cheadle, David Pressman, and Jerry Weintraub, is one of the founders of Not On Our Watch Project, an organization that focuses global attention and resources to stop and prevent mass atrocities such as in Darfur. Damon supports One Campaign, which is aimed at fighting AIDS and poverty in Third World countries. He has appeared in their print and television advertising. He is an ambassador for ONEXONE, a nonprofit foundation committed to supporting, preserving, and improving the lives of children at home in Canada, the United States, and around the world.