The more people there are who ignore facts that contradict their beliefs, the likelier a dictatorship will emerge within a given country. Here is how aristocracies, throughout the Ages, have controlled the masses, by taking advantage of this widespread tendency people have, to ignore contrary facts:
What social scientists call “confirmation bias” and have repeatedly found to be rampant,* is causing the public to be easily manipulated, and has thus destroyed democracy by replacing news-reporting, by propaganda — ‘news' that’s false — in a culture where lies which pump the agendas of the powerful (including lies pumped by the billionaire owners of top ‘news’media and of the media they own) are almost never punished (and are often not even denied to be true). Thus, lies by those powerful liars almost always succeed at enslaving the minds of the millions, to believe what the top economic-and-power class want those millions of people to believe — no matter how false it might happen actually to be.
More @ Strategic Culture