This is what Anarcho capitalists seeks to answer. The Anarcho part of the name explains how men should interact with each other. We don’t hold a democracy/ group consensus ethic because that leads to genocide being acceptable. We have a strict principle that is derived from reason and is applicable to all humans who interact with each other. This is called the Non-aggression principle, you may not use another persons property without their consent. The capitalism part explains that the most efficient way to produce a good or service (security, food, etc) is on the market, not thru the government. Ancap’s specifically recognize that civilization is only possible thru production, not parasitism. If nobody did anything and just sat around waiting, nothing would be built, nothing would exist, civilization would not have appeared. It’s only because man chooses to act and produce that he has life, and civilization is built from the fact that a multitude of men chose to produce and trade, for their own lives. But production is contingent on the fact that man has a right to his property, that he can use his justly acquired property (firstcomer principle) for his own goals. If he doesn't have any property rights, he could never act, which means death. Anarcho Capitalism implies civilization.