Perhaps no single person in the 20th century did more to preserve, broadcast, and redistribute folk music than Pete Seeger, whose passion for politics, the environment, and humanity earned him both ardent fans and vocal enemies ever since he first began performing in the late '30s. His battle against injustice led to his being blacklisted during the McCarthy era, celebrated during the turbulent '60s, and welcomed at union rallies throughout his life. His tireless efforts regarding global concerns such as environmentalism, population growth, and racial equality earned him the r...