History of the Roman Empire disputes about the supreme authority, this finally formalised a peaceful succession of the emperor: in each half a "Caesar" would rise up to replace the "Augustus" and select a new "Caesar". On May 1, 305, Diocletian and Maximian abdicated in favour of their "Caesars". Galerius named the two new "Caesars": his nephew Maximinus for himself, and Flavius Valerius Severus for Constantius. The arrangement worked well under Diocletian and Maximian and shortly thereafter. The internal tensions within the Roman government were less acute than they had been. In "The Decline and Fall of the Roman Empire", Edward Gibbon notes that this
Fall of the Western Roman Empire the reasons for the survival of the Eastern Roman Empire). Comparison has also been made with China after the end of the Han dynasty, which re-established unity under the Sui dynasty while the Mediterranean world remained politically disunited. From at least the time of Henri Pirenne scholars have described a continuity of Roman culture and political legitimacy long after 476. Pirenne postponed the demise of classical civilization to the 8th century. He challenged the notion that Germanic barbarians had caused the Western Roman Empire to end, and he refused to equate the end of the Western Roman Empire with the