The evolution of social change in America can be traced through popular songs by the likes of Nat King Cole, Percy Mayfield, Lena Horne, and the Impressions.

Charlie McGovern (William and Mary) shares from his new book Body and Soul: Race, Citizenship and Popular Music, 1930-1977.

Nancy Hanrahan (George Mason University) says debates about music and democracy used to focus on a shared national identity, morality, and citizenship.

Noel Lobley (University of Virginia) wanted to give colonial musical archives back to the people--so he strapped DJ booths to donkey carts and took to the streets.

Arthur Romano (George Mason University), a consultant on State Department musical missions overseas, says music is an important form of conflict resolution.