In November 2020, when University of Pennsylvania graduate student Mackenzie Fierceton won the prestigious and highly competitive Rhodes scholarship to study at Oxford — one of just 32 scholars selected from a pool of 2,300 applicants — she was praised by the Ivy League school’s president in a newsletter. “Mackenzie is so deserving of this prestigious opportunity,” declared President Amy Gutmann of the 23-year-old from suburban St. Louis. “As a first-generation [to go to college] low-income student and a former foster youth, Mackenzie is passionate about championing young people [and] dedicating herself to a life of public service.” But a...