Widely regarded as one of the most influential songwriters of his generation. Bob Dylan lists him as one of his favorites. Mostly a folk writer, he was a master of lyrics and his songs have been covered by a many artists. Discovered by Kris Kristofferson, he's been around since the early 70's and was often a guest on Austin City Limits. Beyond that, a difficult talent to pigeonhole in a brief description, yet had a very broad following for decades.