Milton Friedman is widely considered the intellectual father of the school choice movement. While Friedman deserves much credit, Father Virgil Blum stands out as an influential figure in the nascent school choice movement. Using archival research, this paper examines Blum's contributions to the movement. From his 1954 doctoral dissertation, which made the legal case for funding religious schools, to his 1958 book, Freedom of Choice in Education, and his decades-long career as a professor, Blum was a tireless advocate for educational freedom. While Friedman made the market argument, Blum made the legal, moral, and religious freedom arguments for school choice.