《13th》 is a documentary film directed by Ava DuVernay that explores the history of racial inequality in the United States. The title refers to the 13th Amendment, which abolished slavery but allowed for involuntary servitude as punishment for a crime. The film examines how this loophole has led to the mass incarceration of African Americans. Through interviews, archival footage, and statistics, 《13th》 highlights the systemic racism embedded in the criminal justice system. It discusses the impact of policies such as the War on Drugs and the role of private prisons, illustrating how these factors contribute to ongoing racial disparities in America.