The volume gives a broad overview of ancient non-Nicene theologies; surveys key councils and events from before Nicaea until the final demise of institutional non-Nicene Christianity in 589; and lays out both the historical background and the theological underpinnings of the thought of Arius himself and of his allies and their successors, down to the repudiation of non-Nicene Christianity by the Germanic kingdoms. This content is organized around the contexts in which "e;Arian"e; thought is encountered, differentiating doctrines across time and space while also demonstrating both intellectual and personal continuity.