This essay will consider the teaching of Eunomius of Cyzicus and/or his followers as a systematic whole. The ancients rarely described ideological movements as “-isms” in our sense; they were much more likely to classify them in terms of a characteristic doctrine (“homoousians,” “heteroousians,” “anomoeans”) or an eponymous leader (“Athanasians,” “Arians,” “Eunomians”). Since these terms were almost always…