This has always been an inherent belief underlying society at an unspoken level. (to use a leftist term, it's systemic) One reason you see so much division and conflict in the culture today is because we are now openly talking about ideological beliefs so much. (well that and "diversity") But there has always been a large segment that thinks that way, and when we didn't push it, everyone kinda just assumed that everyone else agreed with them on the basics. When we used words like "community", "neighborhood", "nation", the words meant different things to different people.

Now we know that half the population or more doesn't agree on fundamental issues of freedom. The genie is not going back in the bottle. Either one side "wins", one side is exterminated, or there is a divorce.

That specific belief isn't limited to leftists. Tradcons and national socialists (though you might call them leftists) are the same way but perhaps not as extreme. And I'm not necessarily opposed to a "tribe" running their society the way they see fit and sharing the wealth, but it can't work in America. It's a matter of scale and homogeneity.

By the way u/FBoysInc I know a lot of people hate libertarianism and I understand the reasons, but one belief of Anarcho-Capitalists is that private property and yourself are one and the same. (everything is reducible to property rights)