By the early 1970s, soul music had been influenced by psychedelic rock and other genres. Artists like James Brown led soul towards funk music, which became typified by 1970s bands like Parliament-Funkadelic and The Meters. More versatile groups such as War, The Commodores, and Earth, Wind and Fire became popular around this time. During the 1970s, some slick and commercial blue-eyed soul acts like Philadelphia's Hall & Oates and Oakland's Tower of Power achieved mainstream success, as did a new generation of street-corner harmony or "city-soul" groups such as The Delfonics and the historically black Howard University's Unifics.