Mark Bray is an American historian, activist, and author, known for his work on human rights, terrorism, and political radicalism. He earned his PhD from Rutgers University, and his research often focuses on social movements, leftist politics, and anarchism. One of Mark Bray's most well-known works is "Antifa: The Anti-Fascist Handbook" (2017), which provides a history of anti-fascist movements and offers insight into their principles and tactics. Bray has also been a part of Occupy Wall Street and has engaged in various forms of activism. His work has been cited in discussions about militant antifascism and he has been a vocal critic of far-right extremism.