05/14/2012 06:16 pm ET Updated Dec 06, 2017

WATCH: Tom Morello and Bill Moyers: Music and Message

Below, watch an extended preview clip from this weekend's Moyers & Company, featuring activist and musician Tom Morello. In the clip, Morello talks about "two Americas," and his solidarity with "the voiceless, the poor, the wretched" across the world.

"If my songs can give some hope to their struggle," Morello says, "That's been a good day at work."

Find out when and where the show airs here.

If you don't know, Morello is the Harvard-educated guitarist who dabbled in politics, then chose rock music to make a difference. He played guitar for the popular band he co-founded -- Rage Against the Machine -- and then for Audioslave. Rolling Stone chose his album "World Wide Rebel Songs" as one of the best of 2011, and named him one of the 100 greatest guitarists of all time.

As likely to be spotted at a grass-roots rally as he would at a concert hall, Morello was in Madison, Wisconsin last year, braving bitter winter weather to sing on the steps on the state capitol in support of public service workers. Morello defended their collective bargaining rights against Republican Governor Scott Walker.

He was in New York City at the May Day demonstrations, an honorary commander of a battalion of musicians they called the "Occupy Guitarmy." That same night, Harry Belafonte presented Morello with the Officers' Award from the Sidney Hillman Foundation, honoring his "advocacy for and support of working people across the world."

This weekend, Tom Morello shares his music, message, and mission -- and I'm all ears.

More information at