The international organization founded to promote peace and cooperation among nations after World War II is the United Nations (UN). Established in 1945, its primary objectives include maintaining international peace and security, fostering friendly relations among nations, and promoting social progress. The UN operates through various specialized agencies and programs, addressing issues such as health, education, and humanitarian aid. Its efforts include peacekeeping missions, conflict resolution, and advocacy for human rights, making the organization pivotal in addressing global challenges and enhancing international cooperation.