Protest songs in the United States

The tradition of protest songs in the United States is a long one that dates back to the 18th century and colonial period, the American Revolutionary War and its aftermath. In the 19th century topical subjects for protest in song included abolition, slavery, poverty, and the Civil War amongst other subjects. In the 20th century civil liberties, civil rights, women's rights, economic injustice, politics and war were among the popular subjects for protest in song. In the 21st century the long tradition continues.
History
Nineteenth Century
19th-century protest songs dealt, for the most part, with three key issues: war, and the Civil War in particular (such as "Johnny I Hardly Knew Ye" from Ireland, and its American variant, "When Johnny Comes Marching Home Again", among others); the abolition of slavery ("Song of the Abolitionist" "No More Auction Block for Me", "Oh Freedom", and "Sometimes I Feel Like a Motherless Child", among others); and...