Internationalism is a political principle which advocates a greater political or economic cooperation among nations and peoples, and whose ideological roots can be traced to both socialism and liberalism. Supporters of this principle are referred to as internationalists, and generally believe that the people of the world should unite across national, political, cultural, racial, or class boundaries to advance their common interests, or that the governments of the world should cooperate because their mutual long-term interests are of greater importance than their short-term disputes.