Irenaeus was not a Trinitarian

A very common misleading claim, even by scholars who should know better, is that the earliest Christian authors (e.g., the Apostolic Fathers) were Trinitarian, or at the very least, "proto-Trinitarian." I just recently encountered this claim in the recent volume by Roger Olson (pp.25-26 of Counterfeit Christianity: The Persistence of Errors in the Church [Abingdon Press, 2015]). However, when one read Irenaeus (as opposed to isolated proof-texts), one will realise that Irenaeus was not a proto-Trinitarian of any sort. I would highly recommend the following four articles on the Christology of Irenaeus of Lyons which refute this claim:

Irenaeus of Lyons

Irenaeus on Jesus' Ignorance

Irenaeus' stage 2 Logos Theory

Irenaeus' Reported Creeds