An automobile without an engine and without brakes will not operate.
Society needs something positive, as an engine, in order to have something which holds it together.
But society is no more safe without brakes than is an automobile. Something negative is also needed. The Law of God gives liberty to the pursuit of self-interest, but it forbids doing what injures the neighbor. And the two function together as an engine and brakes in an automobile. Any other idealistic explanation of what holds society together is a form of medievalism.