Our senior writer reflects on the transformative British band's first visit to America.

From Amnesty to Occupy, the Velvet Underground singer was on the frontlines when it mattered.

Singer, song leader, civil rights activist and scholar describes how music helped demonstrators show solidarity and claim the agenda during the civil rights movement.

Watch Johnny Cash, Pete Seeger, Bernice Johnson Reagon and Tom Morello talk with Bill about the unifying power of music.

The former Rage Against the Machine guitarist discusses the role of music in political protest.

Watch Newtown parents and legendary folk singers raise their voices to comfort a community following the Sandy Hook massacre.

In this 1994 Moyers Moment, the folk singer -- who turns 94 today -- reflects on the role his music played throughout American history.

Newtown parent Francine Wheeler and folk singer Peter Yarrow discuss the power of music to create change.

Bands are raging against the use of their songs for political events.

Tom Morello leads an army of guitarists through the streets of New York City.