The Late Antique Craze for Angels

In Book 11 of the City of God, Augustine adds his own adventurous speculations to the Late Antique craze for angels. He asks whether fallen angels once indeed shared fully in a state of grace and concluded that they, like humanity, possessed the power of reason. The idea of an innate cosmic evil as much as it's implied by a few verses about Satan in the New Testament was also a big no-no because it reminded Augustine of mannequin dualism.