After the Second World War the allied countries got together to discuss in which ways such an organization could be created. In 1945 50 countries got together in San Francisco and signed an agreement that created the United Nations.
OPEC is the Organization of Petroleum Exporting Countries. It was founded in Bagdad in 1960 and has currently 12 members. OPEC’s aim is to regulate the amount of oil that member nations produce and to keep prices at a steady rate.
The European Union is a post – World War II project designed to secure peace in Europe.
The President of the United States is probably the most powerful leader of the world. He has many duties, like signing bills and commanding the armed forces. The president’s advisors get together in the Cabinet.