Detroit's MC5 combined explicit '60s politics with adrenalised heavy rock and elements of R&B and free jazz. Their sound, best exemplified by their thunderous debut album, Kick Out the Jams, was a radical departure from psychedelic rock and contributed directly to the punk movement a decade later. But the band's radical tendencies, which included connections to the Black Panther Party, made them a challenge to market. Subsequent releases lacked their initial fire, and by '72, the group had disbanded. However, they remained a major influence on generations of rock, punk and metal acts.