John Robert Morris (8 June 1913 – 1 June 1977) was an English historian who specialised in the study of the institutions of the Roman Empire and the history of Sub-Roman Britain. He is best known for his book The Age of Arthur (1973), which attempted to reconstruct the history of Britain and Ireland during the so-called "Dark Ages" (350–650 AD) following the Roman withdrawal, based on scattered archaeological and historical records. Much of his other work focused on Britain during this time.
