1. John Greenleaf's Whittier's The Barefoot Boy gives us a glimpse of child labour in America in the 1800's (http://www.poetryfoundation.org/poem/174752).
2. Charles Dickens' The Hymn of the Wiltshire Labourers talks about child labour in Britain in the 1800's (http://allpoetry.com/The-Hymn-Of-The-Wiltshire-Laborers).
3. Charlotte Anna Perkins Gilman's The Anti-Suffragists proves that not all women were for the vote back in the early 1900's (http://www.poetryfoundation.org/poem/182752).
4. Dustbowl Days, by Nicole S. Porter, describes the suffering of the Okies during the Great Depression (http://www.fmschools.org/webpages/pwebsites/index.cfm?subpage=19850). Hence, the term "dust bowl poetry".
5. Requiem to a Fourteen Year Old, composed by Pierre Berton, features a young Steven Truscott, jailed for a murder he did not commit and sentenced to be hanged (http://viewfrominhere.blogspot.ca/2004/10/requiem-for-fourteen-year-old.html).
6. Farewell Saigon Bride, by Joan Baez, addresses the issue of American soldiers' relationships with Vietnamese women during the Vietnam War, most of which ended with the Fall of Saigon (http://www.metrolyrics.com/saigon-bride-lyrics-joan-baez.html).