Howard Zinn is best known for his work on Civil Rights history, particularly through his influential book, "A People's History of the United States." Zinn's perspective emphasized the agency of marginalized groups and the importance of grassroots movements in shaping American history. His scholarship challenged conventional narratives and highlighted the contributions of activists, encouraging inclusive discussions about social justice and equality. Zinn's work remains relevant today, inspiring ongoing dialogues about civil rights and historical interpretation.