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There is more than one author in the GoodReads database with this name

Robert Cohen is a professor of history and social studies in NYU’s Steinhardt School of Culture, Education, and Human Development. He is an affiliated member of NYU’s History Department. His historical scholarship focuses on politics, higher education, and social protest in twentieth century America. His social studies work links middle and high school teachers with the recent advances in historical scholarship and develops curriculum aimed at teaching their students to explore history as a critical discipline – and one that is characterized by intense and exciting debate.

Source:NYU.