R&B, a style of Jump-Blues-based, backbeat-heavy music of the late ‘40s and early ‘50s (think classic Ray Charles and Fats Domino) evolved into Rock and Roll. Meanwhile, those that didn’t go rock went Doo-Wop, then Soul, then Funk, then Urban, Since R&B is another umbrella term, anything from George Clinton to Whitney Houston to Donald Byrd could fit here.