American guitarist, singer, songwriter, and leftist political activist. He is best known for his tenure with the rock bands Rage Against the Machine and Audioslave. Between 2016 and 2019, Morello was a member of the supergroup Prophets of Rage. Morello was also a touring musician with Bruce Springsteen and the E Street Band. Under the moniker the Nightwatchman, Morello released his solo work. Together with Boots Riley, he formed Street Sweeper Social Club. Morello co-founded Axis of Justice, which airs a monthly program on Pacifica Radio station KPFK in Los Angeles