Rothbard and other libertarians do not consider capitalism as a moral system, they consider it as an economic system that servers well a collective. As a result

Rothbard and other libertarians do not consider capitalism as a moral system, they consider it as an economic system that servers well a collective. As a result they make no attempts to justify it morally. This country should be based on laissez-fair Capitalism, which is justified morally by Ayn Rand in her book "Capitalism: The Unknown Ideal".