In the past, whenever I read someone say stuff like what I myself say down below, I put them down as a crackpot:

But as time goes by and I travel the world, I find it's hard to deny that there are and always were distinct classes within human civilization, though the lines may be blurred here and there, and almost everything within every human society serves to preserve those classes, whether as the direct intentional goal or as a convenient side effect.

"Govern" is to "rule"

Other commenters mention the lack of government, and pockets of chaos where gangs/bandits/warlords/disasters run rampant, but those too are different classes versus each other, or vacuums where classes have yet to [re]form.