A peace movement is a social movement the main purpose of which is to achieve ideals such as the ending of a particular war or all wars, minimizing inter-human violence in a particular place or type of situation including the ban of guns and is often linked to the goal of achieving world peace. The first peace movement appeared in 1815-1816. The first such movement in the United States was the New York Peace Society, founded in 1815 by the theologian David Low Dodge and the Massachusetts Peace Society. It became an active organization, holding regular weekly meetings and producing literature describing the horrors of war and advocating pacifism on Christian grounds. The London Peace Society was formed in 1816 to promote permanent and universal peace by the philanthropist William Allen. The United Nations was founded with the primary aim to maintain peace and resolve inter-state conflicts in the World. Many treaties have been signed among many nations a noteworthy one of which is the nuclear non-proliferation treaty. The criteria of the peace movement are that human beings should not wage war on each other or engage in violent conflicts over language, race, natural resources, religion or ideology. It is believed that military power is not equivalent to justice. The first International Peace Congress was convened in London in 1843 by the London Peace Society.