AnCaps are among the most extreme libertarians. Lots of more moderate libertarians think of them as kooks, similar to how leftists think of tankies.
I myself believe in altruism, mutual aid, but also smaller and more effective government. I view large governments and large corporations with skepticism: concentrations of unchecked power are prone to abuse.
I just think humans work better in smaller groups overall. That’s where empathy and personal relationships actually work. When everything turns into statistics we lose our humanity.
AnCap here. Unfortunately in our world there is no possible way to create an AnCap society, so you live within the bounds of what you have.
I’m of the mind that all of the forms of anarchism are utopian. They assume people will behave in certain ways which are contrary to reality. When people don’t behave in those expected ways the whole system breaks.
Game theory helps, as does training in computer security for similar reasons. Basically the idea is that you need to always assume people will try to break the system somehow if they think they can benefit from it.
There have been anarchist communities out there before. (Anarchist proper, not ancaps.) Most (though not all) of them have been destroyed by states who… well, not to put too fine a point on it but: states who hate freedom. I don’t necessarily know what people mean by “utopian”, i think anarchism is quite practical in a lot of cases but i think it also faces a number of significant obstacles.
That’s one of the reasons AnCaps believe in voluntary communities, that way those who didn’t advise but whatever the community’s rules are they can a) be punished based on the rules of the given community, or expelled.