Mr. Castro is the nickname of Fidel Castro, the Cuban revolutionary leader who served as Prime Minister of Cuba from 1959 to 1976 and then as President from 1976 to 2008. He was a major figure in the Cuban Revolution and is widely considered one of the most influential figures of the 20th century. He led Cuba through a socialist revolution and implemented sweeping reforms, including the nationalization of industry and business. He also established close ties with the Soviet Union and other communist countries. Mr. Castro's legacy continues to be felt in Cuba and around the world.