The territory that is now Cuba was inhabited as early as the 4th millennium BC, with the Guanahatabey and Taíno peoples inhabiting the area at the time of Spanish colonization in the 15th century. It was then a colony of Spain, and slavery was abolished in 1886, remaining a colony until the Spanish–American War of 1898, when Cuba was occupied by the United States and gained independence in 1902. In 1940, Cuba implemented a new constitution, but mounting political unrest culminated in the 1952 Cuban coup d'état and the subsequent dictatorship of Fulgencio Batista. The Batista government was overthrown in January 1959 by the 26th of July Movement during the Cuban Revolution. That revolution established communist rule under the leadership of Fidel Castro. The country was a point of contention during the Cold War between the Soviet Union and the United States, and nuclear war nearly broke out during the Cuban Missile Crisis of 1962. Following the dissolution of the Soviet Union, Cuba faced severe economic downturn in the 1990s, known as the Special Period. In 2008, Fidel Castro retired after 49 years; Raúl Castro was elected his successor. Raúl Castro retired as president in 2018 and Miguel Díaz-Canel was elected president by the National Assembly following parliamentary elections. Raúl Castro retired as First Secretary of the Communist Party in 2021 and Díaz-Canel was elected.