Jamaicans created rock steady and ska as well as reggae

Ska band, Concorde 2, Brighton Ska Festival 2007
Originally uploaded by Dazecoop

Reggae is a music genre first developed in Jamaica in the late 1960s, says Wikipedia.

After World War II, Jamaicans purchased radios in increasing numbers and were able to hear rhythm and blues music from Southern United States cities such as New Orleans by artists such as Fats Domino[10] and Louis Jordan.[11] The stationing of American military forces during and after the war meant that Jamaicans could listen to military broadcasts of American music, and there was a constant influx of records from the US.

Reggae denotes a particular music style that originated following on the development of ska and rocksteady. Reggae is based on a rhythmic style characterized by accents on the off-beat, known as the skank. Reggae is normally slower than ska but faster than rocksteady.

It was strongly influenced by traditional African and Caribbean music, as well as by American rhythm and blues.

Ska combined elements of Caribbean mento and calypso with American jazz and rhythm and blues. It is characterized by a walking bass line accented with rhythms on the upbeat.

In the early 1960s, ska was the dominant music genre of Jamaica and was popular with British Mods. Later it became popular with many skinheads.[2][3][4][5] Music historians typically divide the history of ska into three periods: the original Jamaican scene of the 1960s (First Wave), the English 2 Tone ska revival of the late 1970s (Second Wave) and the third wave ska movement, which started in the 1980s (Third Wave).