David Frum has a very interesting review of How Rome Fell: Death of a Superpower. In it he touches upon two other works which address the same topic, The Fall of Rome: And the End of Civilization & The Fall of the Roman Empire: A New History of Rome and the Barbarians. I’ve read them both, and they are excellent histories, though as Frum notes they take different tacks. The former taking a materialist perspective, and the latter a more classical narrative of politics and government. I also agree that to some extent modern multiculturalism has fed into the revisionism which suggests that there was no decline from Classical to Late Antiquity. In From Plato to NATO: The Idea of the West and Its Opponents conservative historian David Gress actually shows how pre-multiculturalist liberal intellectuals, such as Will Durant, privileged pre-Christian antiquity, in particular Greece, and excised the entire period after the fall of Rome and before the rise of the Enlightenment (with a nod to the Renaissance) as making any substantive contribution to the liberal democratic consensus
Where you stand matters in making these sorts of judgements. For obvious reasons Catholic Christian intellectuals of what we term the medieval period did not view the ancient world as superior to their own, because whatever its material or intellectual merits, it was a fundamentally pagan one at its roots. Though the modern West is still predominantly Christian in religion, that religion no longer serves as quite the core anchor that it once did,* and material considerations as well as abstractions such as “democracy” and the “republic” are given greater weight than they once were. I believe that David Gress is right to suggest that attempts by secular liberal historians to deny the essential role of Christendom, the period between antiquity and the age of the nation-state, was driven more by politics than reality. The founders of the American republic were obviously classical educated and that influenced their outlook, as evidenced by their writings as well concrete aspects of culture such as architecture. But they were also heirs to a tradition which defended the customary rights of Englishmen, rights which go back ultimately to Anglo-Saxon tribal law. It is simply laughable to imagine that Greek democracy slept for 2,000 years and reemerged in the late 18th century in the form of the American democratic republic. But, the very same historical factors which make Western civilization what it is today also result in a set of normative presuppositions that does naturally marginalize or diminish the glory of medieval civilization set next to its classical predecessor.
Also, one minor point. Frum says:
…Some scholars have speculated that the empire was depopulated by plague after 200. (William McNeill wrote a fascinating history of the global effects of disease, Plagues and Peoples, that argues for disease as a principal cause of Roman decline.
This could well be true. On the other hand, of the emperors and would-be emperors who contested power in the turbulent 3rd century, only one Claudius II Gothicus, died of plague. At least 17 were assassinated or executed, and four more died under unknown circumstances. Four died in battle, one in captivity after battle – but only two of those five met their end at the hands of foreign enemies. The other three died fighting Roman rivals.
In regards to the hypothesis of demographic decline due to plague, the fact that only Claudius II Gothicus died of this cause is likely a weaker point than one might think. Only one monarch died of the Black Plague, which most historians assume killed 1/4 to 1/3 of Europeans. This is probably most easily interpreted in light of the reality that the elites are relatively well fed, and might therefore have been less susceptible to disease than the populace as a whole. The connection between poor nutrition and a relatively anemic immune response to disease has been offered as one reason why deadly pandemics were much more common in the pre-modern period, when a far higher proportion of the population was nutritionally stressed.
* I think the Islamic world is a better model of how medieval Christians might view their classical pagan cultural forebears. Egyptians take pride in the antiquity of their society, but what was before Islam was jahaliya. The preservation of Greek knowledge by the Arab Muslims during the first few centuries of Islam exhibited a strong selection bias toward works of abstract philosophy. Ancient Greece’s cultural production in the arts held no great interest, so it is only thanks to the Byzantines that many of those works were preserved.