When Trojan Horse in the City of God is the principal defense of conservative Catholicism and an indictment of "progressive" or "liberal" Catholicism. Dietrich von Hildebrand exposes the "progressive" Catholic agenda, its modus operandi and the dangerous heresies it promotes, contrary to traditional Catholic truth including the two main factors contributing to the deterioration of the Church, why true renewal in the church requires reaffirmation (not denigration) of tradition, why translating scripture into "everyday" language undermines faith and trivializes Christ's message, the war against beauty in Catholic art, architecture, and worship, the fundamental error in the "new theologies", the stark contrast between what Vatican II actually said and how it's been interpreted, why heresy must be condemned (and even punished), how relativism supplanted belief in objective truth, tricks progressive theologians play with language, three types of contemporary Catholic philosophers and where they go wrong, and much, much more.