Caesars are back, big caesars and little caesars, in big countries and little countries, in advanced nations and developing nations. The world seems to be full of self-proclaimed strongmen strutting their stuff, or waiting in the wings and plotting a comeback after a humiliating fall. And we thought it couldn’t happen here. How can these uncouth figures with their funny hair, their rude manners, and their bad jokes take such a hold on the popular imagination? How can anyone bear to listen to their endless resentful rants? Surely, they can’t get away with this? People will see through them before it’s too late.

But no. Here they are again, and in numbers. Look who’s leading in Argentina’s presidential race: Javier Milei, a former tantric-sex coach with a wild mop of dark hair and Elvis-impersonator sideburns, known as El Peluca (“The Wig”), who stumps the stage to the backing of a hard-rock group. El Peluca promotes monetarism, free love, and the sale of human organs; claims that climate change is a hoax; and wants to burn down the central bank and close the ministry of education—in short, a ragbag of eye-catchers, because eye-catching is what the would-be caesar is all about.

The little caesars of today seem to get along quite nicely without any systematic ideology worth the name. For what consistent line have Donald Trump, Russia’s Vladimir Putin, Turkey’s Recep Tayyip Erdoğan, Israel’s Benjamin Netanyahu, Hungary’s Viktor Orbán, Brazil’s Jair Bolsonaro, India’s Narendra Modi, China’s Xi Jinping, and even Britain’s Boris Johnson been operating on, beyond a shouty sort of nationalism and a carefully advertised hostility to immigrants—a mixture familiar from ancient times? The great Pericles himself instituted a law barring anyone not of Athenian parentage from claiming citizenship (his own, foreign-born mistress fell foul of the law).

[From the September 2016 issue: Why are some conservative thinkers falling for Trump?]

Yet why should this surprise us? Dictators of one sort or another have been an ever-lurking threat throughout history. They interrupted and betrayed the constitutional traditions of ancient Greece and the Roman Republic: Peisistratos, Critias, and the Thirty Tyrants in Athens; Sulla, Marius, and Julius Caesar in Rome. As early as the time of Thucydides and Plato, the word tyrannos had mutated from a neutral term for “king” into our modern pejorative sense of “tyrant.” Absolutist rulers broke up the city-states of medieval Germany and Italy.

Nice-minded people may shy away from lumping together the excesses of a petty charlatan with the horrific deeds of a mass murderer. How can there be any comparison between a Johnson and a Putin? But only a dullard could fail to notice the painful similarities in their methods: the unabashed mendacity; the contempt for law, parliaments, and due process; and, above all, the relentless propaganda, inflaming old resentments and provoking new ones. “Propaganda, propaganda, now it all depends on propaganda,” Adolf Hitler declared at a tense moment during the Beer Hall Putsch. The putsch failed. But the lesson was learned, and not just by Hitler.

Big caesars may come to power by outright lawless violence or by more or less legitimate means, as Louis-Napoléon, Benito Mussolini, and even Hitler did, and then consolidate their dictatorship in a so-called self-coup or autogolpe. Little caesars go only as far as they need to within a reassuring constitutional framework, which of course they cynically abuse by fixing elections, neutering parliament, and manipulating the courts. “Tinpot dictators” says it nicely. Yes, caesars occupy a broad spectrum, but the caesarist style is always much the same.

It is an uncomfortable thought that caesars may pop up in any country and under all sorts of economic and political conditions. Which is why so many of us prefer not to think it. We would rather look back on any such experience as an unlucky blip that left scarcely a scratch on the body politic, mere “kerfuffle,” as Boris Johnson notoriously brushed aside Trump’s impeachment and acquittal on charges of inciting insurrection against his own government.

But the damage is real enough. In Britain, the tendency on the political right is to concede, at most, that Johnson was too chaotic to be prime minister, too much of a joker to get anything much done. But it was largely Johnson’s personal achievement to smash the U.K.’s legal and political ties with Europe and cripple its continental trade. Less noticed are Johnson’s Five Acts, which came into force last year: restricting the right to judicial review; dissuading the poor from voting by requiring ID at polling stations (which even Johnson’s ally Sir Jacob Rees-Mogg described as a form of “gerrymandering”); bringing the Electoral Commission under the direct control of the government; granting the prime minister the unrestricted right to dissolve Parliament; giving the police the right to ban “noisy” protests; and, of course, stringent (but so far wholly ineffective) immigration controls. These measures bear a strong family resemblance to the repressive Six Acts of Lord Liverpool’s government in 1819, and are likely to be remembered with equal loathing.

[Read: Ancient Rome’s collapse is written into Arctic ice]

Those who continue to indulge the memory of Johnson as an overpromoted but endearing clown who kept us amused for a while should also recall his power-grabbing and obnoxious style of government. He purged the party of 21 senior members of Parliament, including two ex-chancellors of the exchequer. He sacked some half a dozen top civil servants in defiance of constitutional tradition. He expanded the Downing Street apparat from a few dozen to more than 100 functionaries. He diluted the ministerial code, so that offenders might escape with a reprimand instead of automatic dismissal, and then proceeded to let off or ignore a string of gropers and chiselers. And he repeatedly lied to Parliament about Partygate, which forced him to slink out of office in a humiliating exit never before experienced by a British prime minister.

Last year in the U.K., the Year of the Three Prime Ministers, may not have been as bloody as A.D. 69 in ancient Rome, the Year of the Four Emperors (two of them were murdered and a third topped himself). But it was a uniquely excruciating moment in our modern political history, when chaos collapsed into farce, and at ruinous expense to the nation, while the world looked on in amazement and contempt.

And how has America fared? There was nothing original about Trump’s agenda. Protectionism, hostility to foreign entanglements, persecution of immigrants (the title of Most Hated Immigrants passing over the years from the Italians to the Irish to the Jews, to the Chinese, to the Japanese, to the Mexicans)—all of this has been the staple fare of the American right since the 19th century. What is original about Trump, as is true of all caesars and would-be caesars, is the technique: the tweets, the rallies, the bullying, the nicknames, the floodlights, the slogans.  

A caesar creates his own visual culture and basks in it. Emperor Augustus had the text of his boastful brief autobiography, Res Gestae Divi Augusti, cast in bronze or carved in stone and then erected in public spaces all across the empire; today you can still see surviving fragments of this huge exercise in global PR. Ever since, the caesar has been a pioneer in the use of new media, including the inventions of printing and photography, the development of advertising, later cinema, radio, and television, and finally—perhaps most potent of all—social media, which gives him unrivaled direct access to every voter. Trump said quite frankly, “Without the tweets, I wouldn’t be here.”

[Helen Lewis: Here lies Boris Johnson]

The caesar’s delight in the visual image is no accident. He thrives in the moment; he is the enemy of long-winded statutes and codes of law and practice, and is the king of the photo opportunity. He is an endless source of stunts, gestures, masquerades: He may appear in the guise of a Greek god or a Roman emperor, or a construction worker or a fighter pilot, never resting in his efforts to convince the public that life is simply more vibrant, more fun when he is around. His verbal messages are deliberately simple, aimed at the lowest common denominator in his audience (a method extolled ad nauseam by the author of Mein Kampf). These communications also necessarily involve a good deal of distortion of the truth. Caesars are shameless liars. After two millennia, scholars have cottoned on to the fact that Julius Caesar embellished or invented large parts of his history of the Gallic Wars. Napoleon’s communiqués were so overblown that “to lie like a bulletin” became a catchphrase.

Caesars know how to intimidate as well as charm, to frighten and shock, often by the use of foul language. Remember how Johnson scuppered Theresa May’s deal with the European Union by repeatedly denouncing it as “polishing a turd.” When, in the 1650s, Oliver Cromwell was attacked by judges for his lawless actions, he reportedly vilified them for invoking “Magna Farta,” and called the Petition of Right “the Petition of Shite.”

Only a caesar can get things moving by making the circumstances abnormal. Otherwise, the new “national conservatism”—or the less pleasant inflections that its name brings to mind—is likely to remain the niche pursuit of a disgruntled minority. Yet the one thing that the movement’s Statement of Principles does not mention is leadership, because its promoters know that this is an indecent subject. The yearning for a strongman cannot be openly admitted. But they can’t do without him.

[Rory Stewart: What to do when your political party loses its mind]

Only a caesar has the chutzpah to break the rules, and to break open the treasury, as Julius Caesar did to grab the gold and silver needed to prosecute his war against Pompey, and Trump did under his emergency decree 9844 to grab the billions of dollars to build his Mexican wall, which Congress had denied him. By contrast, the idea that there is some hidden continuity between the conservatism of, say, Margaret Thatcher and today’s new right is fantasy. Thatcher was bossy and overbearing, and she made quite a few bad mistakes (her attempt to impose a poll tax, for one), but she was a stickler for the rules—as well as being a qualified lawyer, not a profession followed by most caesars—and she was deeply distressed when she was thought to have broken the code, as, for example, over the Westland Affair.

Political analysts are rather reluctant to consider the phenomenon of caesarism. They prefer to think up new abstractions, or revive old ones, to describe the political tendencies of our day: authoritarian populism, white nationalism, illiberal democracy, neofascism. These terms may convey the broad outline of what we see around us, but not the motive force: We get a good idea of what the cart looks like, but where’s the bloody horse? Without the spark of a caesar, the rumbling discontents are unlikely to catch fire. Caesarism isn’t just a cute trope; it’s an ever-recurring danger. The crucial thing is to spot the incoming caesar before he crosses the Rubicon—and above all, to stop him from doing the comeback-kid act. Nobody said it was easy.

But it can be done. This is an age of caesar-toppling, too. In the past three years, a U.S. president has been impeached twice, before and after being thrown out by the voters, and a British prime minister has been forced to resign by mass defections among his own ministers and then forced to leave the House of Commons by the Privileges Committee. The constitutional checks and balances worked. Accountability kicked in. We must never fall into the complacency of assuming that we have reached some liberal-democratic nirvana. History goes on, and it is still ours to make and remake. If applied with a little persistence, the rules can always break the rule-breakers in the end.

An audit opinion says due process was not followed when the government approved the bill for the former PM's lawyers.