"Thirteenth" is a documentary film directed by Ava DuVernay that explores the history of racial inequality in the United States. The title refers to the Thirteenth Amendment to the U.S. Constitution, which abolished slavery but allowed for involuntary servitude as punishment for a crime. The film examines how this loophole has led to systemic racism and mass incarceration. The documentary features interviews with scholars, activists, and politicians, highlighting the connections between slavery, Jim Crow laws, and the modern prison system. It emphasizes the impact of policies and societal attitudes on African Americans, urging viewers to consider the ongoing effects of these historical injustices.