The United Nations (UN) is an international organization that brings together all states in the world. It is the most prominent organization in the world. The UN was founded in 1945 immediately after the Second World War to arbitrate on international disputes that could scale up to the kind of conflict that was experienced in the world wars. It replaced the League of Nations that had been formed after the First World War. The main role of the UN is to provide an international platform for dialogue and stop wars between nations. However, its mandates have been expanded since then to include other major functions.