After holding many offices in Puerto Rico and improving ties with the United States, Luis Muñoz Marín was the first governor elected by the people of Puerto Rico in 1948. As governor, Marín started Operation Commonwealth. The goal of the program was to achieve more self-rule from the United States. Puerto Rico succeeded in becoming a commonwealth of the United States in 1952, as a result of Marín’s efforts. Marín fought hard for the interests of Puerto Rico’s poor people.