" A major portion of the cost of defense against foreign aggression in a laissez-faire society would be borne originally by business and industry, as owners of industrial plants obviously have a much greater investment to defend than do owners of little houses in suburbia. If there were any real threat of aggression by a foreign power, businessmen would all be strongly motivated to buy insurance against that aggression, for the same reason that they buy fire insurance, even though they could save money in the short run by not doing so. An interesting result of this fact is that the cost of defense would ultimately tend to be spread among the whole population, since defense costs, along with overhead and other such costs, would have to be included in the prices paid for goods by consumers. So, the concern that “free riders” might get along without paying for their own defense by parasitically depending on the defenses paid for by their neighbors is groundless. It is based on a misconception of how the free-market system would operate. "

― , The Market for Liberty