Comment by shadowgovt

Yes, that's the essence of social contract theory. Which, it should be noted, is a historical falsehood, in that we're pretty sure no ancient tribe ever really started with people sitting down and saying "It is mutually beneficial if we curb our violent inclinations for the safety and security of blah blah blah"... but is a useful shorthand for the observed notion "A government lasts only as long as it provides a better alternative to picking up a 2x4 and settling your own scores for most people who support it."

"You rule because they believe," in essence.

(This is why, historically, you'll often see societies keep their pattern of government until, say, famine comes along. Because if you're going to starve to death, the likely outcome calculus on picking up a 2x4 starts to change drastically and quickly).