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
The History of the Decline and Fall of the Roman Empire Gibbon challenged Church history by estimating far smaller numbers of Christian martyrs than had been traditionally accepted. The Church's version of its early history had rarely been questioned before. Gibbon, however, knew that modern Church writings were secondary sources, and he shunned them in favor of primary sources. Historian S.P. Foster says that Gibbon: Volume I was originally published in sections, as was common for large works at the time. The first two were well received and widely praised. The last quarto in Volume I, especially Chapters XV and XVI, was highly controversial, and Gibbon was attacked as a "paganist".