History of the Roman Empire founder of the brief Flavian dynasty, to be followed by the Nerva–Antonine dynasty which produced the "Five Good Emperors": Nerva, Trajan, Hadrian, Antoninus Pius and the philosophically inclined Marcus Aurelius. In the view of the Greek historian Dio Cassius, a contemporary observer, the accession of the emperor Commodus in 180 AD marked the descent "from a kingdom of gold to one of rust and iron"—a famous comment which has led some historians, notably Edward Gibbon, to take Commodus' reign as the beginning of the decline of the Roman Empire. In 212, during the reign of Caracalla, Roman citizenship was granted
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".