Calypso is a style of Afro-Caribbean music which originate in Trinidad and Tobago at about the start of the 20th century. The roots of the genre lay in the arrival of African slaves, who, not being allowed to speak with each other, communicated through song. This forged a sense of community among the Africans, who saw their colonial masters change rapidly, bringing French, Spanish and British music styles to the island of Trinidad. The French brought Carnival to Trinidad, and calypso competitions at Carnival grew in popularity, especially after the abolition of slavery in 1834. While most authorities stress the African roots of calypso, in his 1986 book Calypso from France to Trinidad, 800 Years of History veteran calypsonian The Roaring Lion (Rafael de Leon) asserted that calypso descends from the music of the medieval French troubadours.