[Alex Murphy]

Perhaps the greatest surprise was the damage done by Constantine who, having made it the religion of his empire, gave rise to an indolent and hypocritical Church hierarchy initially composed of Roman aristocracy. It fostered a clergy who were ignorant of the faith and indifferent to its mission. Not until the Reformation was competition introduced, forcing the Church to return to piety, as various Protestant sects emerged, and energized Christianity in the process.

Ping for later

[Campion]

Perhaps the greatest surprise was the damage done by Constantine who, having made it the religion of his empire,

Historical error #1: Theodosius the Great did that, not Constantine.

gave rise to an indolent and hypocritical Church hierarchy initially composed of Roman aristocracy.

Historical error #2. Ambrose, Augustine, and the Cappadocian Fathers were "indolent and hypocritical"???

It fostered a clergy who were ignorant of the faith and indifferent to its mission.

Same comment as above.