According to music critic Dorian Lynskey, protest music isn't what it used to be. In his new book, "33 Revolutions Per Minute," Lynskey looks at some of the best-known protest songs from Billie Holiday to Green Day.
In his book, Lynskey examines the cultural circumstances that produced protest songs. Sociologist Richard Flacks joins Lynskey to discuss the history and future of protest music.
