Is there some reason to believe that markets can exist without government intervention of some kind? At a minimum someone needs to ensure that the participants in the market are not killing each other. Even in prison economies there are de facto "governments" (inmates with power in the prison hierarchy) that keep the "market" orderly and decide the rules.
In the absence of government, trade tends to be limited to occasional encounters between groups of people and too infrequent for any kind of market to form as an emergent phenomenon. In the absence of government, an encounter between strangers can quickly turn into a deadly fight, and an offer to trade may just as easily be a pretext for killing someone to steal their possessions. Markets can only exist when the worst outcome of a bad deal is getting swindled.