All sufficiently-complex systems are self-ordering. Think of an ecology. The conifers grow on the hills and the cactii in the deserts. Nobody orders them to. It just happens. The same thing happens in an economy. We use the term "marketplace" to refer to this particular self-ordering mechanism.
When government imposes its will on society, this has the effect, not of imposing order on disorder, but rather of freezing motion. In other words, it does not impose order. It imposes stasis.
When government imposes its will on society, this has the effect, not of imposing order on disorder, but rather of freezing motion. In other words, it does not impose order. It imposes stasis.
You talk of government as if it were a foreign entity imposed on society. That may be true when one nation conquers another; otherwise, every government grows out of a particular community or nation. One could say that government, like the economy, is a "self-ordering mechanism."
Just as some trees grow in the mountains and not in the desert, some forms of government have florished in some societies and not in others. Have you considered why there are no anarchistic societies anywhere today? What sort of society would be required for anarchy to form and florish spontaneously?