Book excerpt: "Dynamic Monarchianism" is a term often used in histories of Christian dogma to describe one view of the relationship between God and Jesus that was extant in the second and third centuries. This view is classed as being heretical as it is in conflict with orthodox teaching regarding the Trinity, the view that God is three Persons (Father, Son and Spirit) existing in one Substance. Whilst the early church fathers often assumed some connection between those who held this view, modern scholarship has tended to treat them as isolated cases.In this book I argue that the Dynamic Monarchians were connected. Not by personal contact, or by being a separate church, but because they drew from a shared tradition. Further, I argue that this tradition pre-dates Trinitarian Christologies and maybe the earliest Christology.