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 place of "Decline and Fall"), especially when dealing with large nations or empires. Piers Brendon notes that Gibbon's work, "became the essential guide for Britons anxious to plot their own imperial trajectory. They found the key to understanding the British Empire in the ruins of Rome." and in film: and in television: The title and author are also cited in Noël Coward's comedic poem "I Went to a Marvellous Party". And in the poem "The Foundation of Science Fiction Success", Isaac Asimov acknowledged that his Foundation series – an epic tale of the fall and rebuilding of a galactic empire