Peace Organizations
International Association
International Peace Bureau
International Physicians for the Prevention of Nuclear War
War Resisters' International
Women's International League for Peace and Freedom
World Federation of United Nations Associations
Notes:
Many international peace organizations have been short-term coalitions for narrowly defined objectives (such as the International Consultative Group for Peace and Disarmament which promoted general disarmament through the League of Nations in the 1930s). Listed here are some of the longest-standing and more general international peace organizations, plus one of the first organizations to describe itself as 'international'.