Introduction
When it comes to the history of Christian thought, Irenaeus is most famous as the greatest opponent of Gnosticism in the early Church. For that reason his polemic has received considerable attention and at times his polemical significance has overshadowed his importance as a theologian. But a focus on his polemical significance was not the only thing that discouraged nuanced analysis of his theological account. For his theological ability and even intelligence have been impugned for generations. As a result central aspects of Irenaeus’ thought have gone unexplored—especially the metaphysical dimension of his theology. This Introduction locates this study within the scholarly conversation about Irenaeus that has taken place over the past two centuries, and then summarizes the themes and chapters that constitute the study proper.