The major international organization formed after World War II was the United Nations (UN), established in 1945. Created to promote international cooperation and prevent future conflicts, the UN aimed to foster peace, security, and mutual understanding among nations. It replaced the ineffective League of Nations and sought to address a range of global issues such as human rights, economic development, and humanitarian assistance. The UN consists of various specialized agencies and bodies, including the Security Council and the General Assembly, serving as a platform for dialogue and negotiation to resolve international disputes and promote sustainable development worldwide.