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 object, to which my plan was originally confined. Although he published other books, Gibbon devoted much of his life to this one work (1772–1789). His autobiography "Memoirs of My Life and Writings" is devoted largely to his reflections on how the book virtually "became" his life. He compared the publication of each succeeding volume to a newborn child. Gibbon continued to revise and change his work even after publication. The complexities of the problem are addressed in Womersley's introduction and appendices to his complete edition. Many writers have used variations on the series title (including using "Rise and Fall" in