The 4th-century writer, Eunomius of Cyzicus, is virtually the only Arian theologian whose dogmatic works have survived to any significant degree. As an important representative of Arianism, he has provided unique insight into the world of Arius's followers, recognizing their continuation of his work and their criticism of it. The most complete edition of Eunomius's works yet published, this unique work contains both the actual text of, and the means of access to, all of Eunomius's surviving works and fragments. With new translations by the editor, this definitive collection offers a readable text that casts new light on the meaning and significance of Arianism.