Government is Irrational.

[Koolay]

Slavery isn't a system it's basically someone is more powerful than someone else so therefore they take the freedom of someone else.

So you are saying that's not what governments do?

I'm not saying that there is no better system than the government. But since you're using examples from history of systems which haven't worked has a country ever been successful and thriving with a good health care system and economy while in a state of anarchy?

There hasn't been a country free from initiation of violence. Since very few people in the world are rational thinkers. Good people just have to submit to the violence and live successful private lives, and try not to receive too many blows to the head from the primitive.

Anarchy isn't an abuse of power, but humans have been known to abuse whatever power or strength they have when no laws are in place to stop them.

The definition of Anarchy is rules, but no rulers.

Unfortunately, a large-scale society running without an overseeing institution handling all the logistics seems irrational too. :/

If having an entity exempt from rules and morality that claims to be in society's best interest overseeing society is a principle for you, who will oversee the overseers?