However, that phrase—“the Putin regime”—which has been stuck to all discussions of Russian politics now for almost 20 years, in some ways itself helps explain why so many people who believed they understood the country turned out to be so wrong about the Ukraine conflict. It has become clear that what exists inside the Kremlin is no longer a “regime” at all—a system of government where multiple figures can affect and feed into decision-making, from security chiefs to billionaires—as many believed.

Instead, it has transformed into what political scientists call a personalist dictatorship, where the whims of one man, and one man only, determine policy, a fact that has terrifying implications for Russia and the world.

Americans tend to see the world in much the same way as President Joe Biden frames it in his speeches, divided neatly between “democracies” and “autocracies.” But the reality is that authoritarian states exist on a political spectrum depending on how much power is exercised by a single individual—and where states land on this spectrum has a big impact on matters of war and peace. At one end, you have civilian-run regimes, like Hu Jintao’s China or Leonid Brezhnev’s Soviet Union, where political power is checked and shared within a ruling party. At the other, you have personalist dictatorships like that of, say, Saddam Hussein, where rivals are purged, loyalists are rewarded, cults of personality flourish, and all authority runs through the glorious leader.