Rasta, or the Rastafari movement, is a religion and philosophy that accepts Haile Selassie I, the former (and last) emperor of Ethiopia, as Jah (the Rasta name for God incarnate, from a shortened form of Jehovah found in Psalms 68:4 in the King James Version of the Bible), and part of the Holy Trinity as the messiah promised in the Bible to return. The name Rastafari comes from Ras (Duke or Chief) Tafari Makonnen, the pre-coronation name of Haile Selassie I.
The movement emerged in Jamaica among working-class and peasant black people in the early 1930s, arising from an interpretation of Biblical prophecy partly based on Selassie's status as the only African monarch of a fully independent state, and his titles of King of Kings, Lord of Lords, and Conquering Lion of Judah (Revelation 5:5). Other factors leading to its rise include the sacred use of marijuana, and various Afrocentric social and political aspirations, such as the teachings of Jamaican publicist and organiser Marcus Garvey (also often regarded as a prophet), whose political and cultural vision helped inspire a new world view. The movement is called Rastafarianism by some non-Rastas although some Rastas themselves regard that term as improper and offensive.