Thanks for the question in the Rock / Pop section. People need to know that Rock, punk, metal and even pop music was born from the roots of guys like Johnson and Clapton. T Bone Walker was one of the first to record blues music played on an electric guitar. This inspired guys like BB king, Otis Rush, Muddy Waters and others. This was the inspiration for Clapton, Peter Green, Beck and Bloomfield. By the late 60's electric rock was was being forged into metal and punk.
These people were all pioneers of their time. To answer you question you must answer this one " Who wrote "Crossroad Blues"?