The American historian who wrote "A People's History of the United States" is Howard Zinn. Published in 1980, Zinn's work presents a perspective of American history that emphasizes the experiences of marginalized groups, challenging traditional narratives. His focus on themes such as class struggle, race, and social justice has profoundly impacted how history is taught and understood. Zinn's book resonates with those seeking a more inclusive and critical interpretation of the past, encouraging readers to consider the voices often left out of mainstream history.