Totalitarianism is not becoming more popular. Russia is not totalitarian, Venezuela is not totalitarian, and even China is not really totalitarian anymore.

These are authoritarian countries. Meaning that they don't have an official ideology, the real one that has people willing to die for it. If anything, they are focused on suppressing people and keeping them passive.

Iran is a notable exception here. They _are_ a totalitarian theocratic state, and this makes them more resilient. They are not governed by a single person but by ideology, even if it's unpopular among the people.

Authoritarian states are fragile in comparison. They struggle to survive the removal of their leader, especially the ones that had governed for a long time. The long-time ruler inevitably becomes the arbiter between the elites, a focal point of their undercover agreements.

And once the ruler is gone, the elites are now faced with a new round of struggles. So the smarter ones decide that perhaps it's a good idea to have some kind of collegial power, where people can discuss their disagreements rather than shoot each other. This usually results in the country becoming milder and not so carnivorous towards its citizens.

The USSR was a good example. Stalin died, and his successors decided that a new Stalin was not a good idea. Instead, they gave power to the Politburo, where the General Secretary was "the first among equals". The USSR did not become a human rights paradise afterwards. But it never had any more mass purges, deportations, or mega-projects built with slave labor of GULAG inmates.