This chapter analyzes how Syriac historiography is a rare example of non-etatist, non-imperial, history writing. It was produced, copied, and preserved entirely within Christian church structures. The Syriac-using Christians, however, were divided into numerous rival denominations and communities as a consequence both of the fifth-century theological controversies and of geopolitical boundaries. And since both of these factors strongly influenced both the motivations which underpinned the production of history writing and the forms it took, historians need to have some knowledge of these rival Syriac denominations. Because of internal Christian debates about the relationship of the divinity and humanity within Christ during the fifth century, the Syriac-using churches fragmented. All accepted that Christ was perfect God and perfect man, but differed fiercely about how to articulate this.