Part 5 of the documents on the Arian controversy includes documents from the years 362–380. This phase was characterized by the process of theological differentiation that led, on the one side, to the creation and formation of neo-Nicene, and on the other, to the foundation of a separate anti-homousian church. Part 5 concludes with the start of the reign of Emperor Theodosius and the edict conctos populos.