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Gregory D. Sumner is chair of history at the University of Detroit Mercy, where he has taught since 1993. He holds a doctorate in American history from Indiana University and is the author of Dwight Macdonald and the Politics Circle. Sumner has been awarded summer fellowships by the National Endowment for the Humanities, and has twice been William J. Fulbright Senior Lecturer at the Université di Roma Tre. His most recent book is Unstuck in Time: A Journey Through Kurt Vonnegut’s Life and Novels.