Walter Johnson teaches history at Harvard and is the author of The Broken Heart of America: St. Louis and the Violent History of the United States, Soul by Soul: Life Inside in the Antebellum Slave Market, and River of Dark Dreams: Slavery and Empire in the Mississippi Valley's Cotton Kingdom. His autobiographical essay, “Guns in the Family,” was included in the 2019 Best American Essays; it was originally published in Boston Review, of which Johnson is a contributing editor. Johnson is a founding member of the Commonwealth Project, which brings together academics, artists, and activists in an effort to imagine, foster, and support revolutionary social change, beginning in St. Louis.