The document summarizes how different groups in the US after the Civil War promoted competing narratives to explain the causes and consequences of the war. It discusses how Black Americans, abolitionists, and Radical Republicans emphasized slavery as the fundamental cause and the need to secure rights for freed slaves. Meanwhile, many Southerners pushed the "Lost Cause" narrative and idea of states' rights. Ultimately, the dominant narrative became one of "Reunion" and "Reconciliation" to help reunite the country. Popular culture works like novels, films, songs, and photographs played a large role in shaping and spreading these competing memories of the war.