Rev. Reginald Garrigou-Lagrange, O.P.

Réginald Garrigou-Lagrange (1877–1964) was a French Dominican friar and one of the most influential Catholic theologians of the twentieth century. Ordained a priest in 1902, he spent the bulk of his career teaching theology and philosophy at the Angelicum (the Pontifical University of Saint Thomas Aquinas) in Rome, where he became renowned as a rigorous defender of Thomistic philosophy and scholastic method.

He was a prolific author whose works on mystical theology — particularly The Three Ages of the Interior Life and Christian Perfection and Contemplation — remain classics of Catholic spiritual literature. A staunch orthodox Thomist, he was a sharp critic of movements he considered theologically problematic, including certain currents of the nouvelle théologie.