Cullen Murphy writes at The Atlantic about America's current political state in "No, Really, Are We Rome?". He wrote a book on the topic some time ago, and revisits the idea that we're watching a similar fall of an empire.
If I were writing Are We Rome? today, one new theme I’d emphasize emerges from a phrase we heard over and over during the Trump administration: “adults in the room.” The basic idea—a delusion with a long history—was that an unfit and childish chief executive could be kept in check by the seasoned advisers around him, and if not by them, then by the competent career professionals throughout the government. The administration official who anonymously published a famous op-ed in The New York Times in 2018 offered explicit reassurance: “Americans should know that there are adults in the room.” Various individuals were given adult-in-the-room designation, including the White House counsel Don McGahn and Chief of Staff John Kelly. I sometimes imagined these adults, who included distinguished military veterans, wearing special ribbons. The obvious flaw in the arrangement was that the child could summarily dismiss the adults with an intemperate tweet.
For long periods in the late fourth and early fifth centuries, the Roman empire was literally in the hands of children, as reigning emperors died unexpectedly and sons as young as 4 and 8 ascended to the most exalted rank. Adults in the room were appointed to serve them—often capable generals such as Stilicho (who served Honorius) and Aetius (who served Valentinian III). The idea was to acknowledge imperial authority as sacrosanct but at the same time have people in charge who could handle the job. And often it worked, for a while. The diplomat and historian Priscus described what happened when Valentinian grew up. The emperor’s intemperate tweet took this form:
As Aetius was explaining the finances and calculating tax revenues, with a shout Valentinian suddenly leaped up from his throne and cried out that he would no longer endure to be abused by such treacheries … While Aetius was stunned by this unexpected rage and was attempting to calm his irrational outburst, Valentinian drew his sword from his scabbard and together with Heracleius, who was carrying the cleaver ready under his cloak (for he was a head chamberlain), fell upon him.There is no substitute, it turns out, for actual leadership at the top. Even so, when the adults are gone, the next line of defense is bureaucratic heroism. A civil service is one reason entities as large as the Roman empire—or the British or American one—have had staying power. Watch the behavior of imperial functionaries in the fifth century, when much of the Roman world was falling apart, and you see the ability of bureaucratic procedure and administrative competence—food goes here, gold goes there—to hold bits of the rickety scaffolding together when no one seems to be in charge. I’m not aware of ancient references to a civitas profunda, but the “deep state” is neither a modern nor a malevolent invention.
I do like this caution he gives in the article, though:
The comparisons, of course, can be facile. A Roman state of some sort lasted so long—well over a millennium—and changed so continuously that its history touches on any imaginable type of human occurrence, serves up parallels for any modern event, and provides contradictory answers to any question posed. Still, I am not immune to preoccupation with the Roman past.