Like any monoculture, markets based on a monopoly are brittle. It takes time for courts to process complaints or for new companies to get started; if the only

Like any monoculture, markets based on a monopoly are brittle. It takes time for courts to process complaints or for new companies to get started; if the only entity serving a market changes its behavior for any reason, it can shock the entire system and do great harm while our correction mechanisms work to alleviate the problem. You see this in the job market all the time: a local factory closes and puts everyone in town out of work.