Musically, Bob Marley followed a fairly well-trodden trajectory: from raw and urgent 60s ska through a series of killer pop reggae hits in the early 70s, to a more heavy, religious roots sound in the latter part of the decade. What separated him from similarly talented contemporaries like Toots Hibbert, Desmond Dekker and Johnny Osbourne – and made him a global icon rather than simply a Jamaican star – is summed up in breakthrough 1973 album Catch A Fire.