Gary Habermas wrote The Verdict of History, 1988. In it he shows 39 ancient sources documenting the life of Jesus: 100 facts concerning Jesus' life, crucifixion, and resurrection.
24 of those sources, including 7 secular and several earliest creeds of the church, specifically concern the divine nature of Jesus.
Therefore, the doctrine of the deity of Christ was present in the earliest church.
Bookmarks