Anarchy

[Ego]

The Ottoman Empire tried to force people many people they conquered with "firepower" and look at what happened to them.

Yes, but that's the Ottoman Empire. They didn't have enough firepower.

That's not idiotic, that's anarchy. Families are a societal thing. The only reason you think any one is important is due to societal values or some deluded idea that you have ownership over them(aka love). In short they don't exist in anarchy after a generation or two. The individual is the ruler in anarchy, the only reason to associate with anyone is to take from them or kill them.
Of course I'm arguing from the negative prospective because I don't believe in natural law or the inherent good of humanity. If you believe in that then anarchy is this sort of blissful social network with not rules and nothing ever bad happens cause you're free and good you won't kill Jimmy to take his 50" flat screen that you really want even though if you do no one will do jack shit about it or has the right to cause there are no laws or rules.
You want to see anarchy look at history. State/countries are in anarchy. There is no real international law and each state does what it thinks is best. They form alliances temporarily then turn around and attack their allies after their perceived foes are killed. The only reason that things don't completely fall apart any more like they used to is because their is a hedgemon. Hedgemons are the strongest, biggest, baddest kids on the block and force event to go in their favor. When ever a hedgemon weakens there are really big wars. I'll give you two famous examples: WWI & WWII. Britain and France fell from power, America and Germany and Russia fight over who replaces who in the world. Things have only been peaceful for as long as they have because we currently live in a unipolar world, which is unprecedented. In other words through out history there have been to hedgemons who fight intermediately but mostly keep things balanced and peaceful aside from taking shots at each other every decade or so. Since the fall of the USSR the US has owned the world and because we're a free market economy and peace is good for business we point our nukes at people, limit who gets nukes, and started making other countries free market economies so we could make money. The Us is declining now as the hedgemon, we may yet stay the most powerful country in the world but we will not be able to take on the whole world as we could have say 10-20 years ago. If we screw up and slip more than we have then eventually Europe and the US end up in a war with Russia and China with India on one side or the other. Oh, and we lose.

You underestimate the power of capitalism and the natural greed of humans.

If we went to war with China, all they'd need to do is shut down all their exports to this country. They wouldn't even need to lift a finger because armies are superficial when it comes to dealing with the countries that have managed to make themselves more important.

However, I digress. People may be backstabbing assholes, but there are certain ingrained habits and values that people will cling onto for dear life. Family is one of the bigger ones. There is no state of anarchy where the entire fabric of a society, governed or otherwise, falls apart because then those people are no longer people in a state of anarchy, but livestock in an ungoverned area. Even if there was, it would not last for very long.