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Mackenzie Fierceton (born Mackenzie Terrell on August 9, 1997; later Mackenzie Morrison,) is an American activist and graduate student currently studying at Oxford University. Raised in Chesterfield, Missouri, a West County suburb of St. Louis, she attended and graduated from the Whitfield School in Creve Coeur. At the University of Pennsylvania, she received a bachelor's degree in political science and a master's degree in social work through a combined five-year program.