Donald L. Horowitz (born 1939) is James B. Duke Professor of Law and Political Science at Duke Law School and Duke University in Durham, North Carolina, United States. He earned his PhD from Harvard University in 1968 and also holds degrees from Syracuse University. He is a specialist in the study of ethnic conflict and author of the books Ethnic Groups in Conflict (University of California Press, 1985), A Democratic South Africa? Constitutional Engineering in a Divided Society (University of California Press, 1991), The Deadly Ethnic Riot (University of California Press, 2001) and Constitutional Change and Democracy in Indonesia (Cambridge University Press, 2013). Writing about Ethnic Groups in Conflict, political scientist Ashutosh Varshney states that it "was a seminal text", and that: