the reason there are messed up places like that is not because of lack of government, its because of the mentality of the people there.
if they form a government it will be even worse then the situation where the warlords don't have a monopoly on military power.
America would not turn into a place like that should the government disappear, because the ethics of the people are different.
people in America generally respect the non aggression principle.
https://en.wikipedia.org/wiki/Non-aggression_principleIt is easy to think that "those people" are just doing it wrong and that Americans are somehow different. But there is no evidence of that. I, for example, do not respect non-aggression. I would offer free booty and slaves for those who will pillage with me. There is no middle ground, you are a slave or you are a king in an anarchy. You can probably guess how many kings are needed in such a system.
I saw a good example in Croatia during the civil war. Everyone thought that since they were Europeans it couldn't get that ugly. Well, they fought tooth and nail like beasts. No different than the wars I saw in Africa or Central America.
If this were a real anarchy then the posters in this thread would be put to the sword for saying what they said. But don't hate the warlord, he's just exercising his freedom.
you would not be able to pillage anyone because they would be defended by a whole bunch of private armies who do respect non aggression because wars cost money and its better for business to just settle disputes in an agreed private court.
as long as the majority of military power respects non aggression a minority attacker will not be successful.
same way as you need 51% of hashing power in bitcoin to consistently attack the network successfully.
the reason those messed up countries don't work is that the majority doesn't follow the non aggression protocol, that's not the case in America.
having multiple privately funded armies sharing power is not exactly anarchy.
because they have to compete for customers the free market will weed out the ineffective non profitable armies and you would be left with very effective protection against any aggression.