Morris and Linda Tannehill were two libertarian activists and thinkers who, in the early 1970s, made surprisingly profound advances in the theory of the stateless society.
Their free-market manifesto, The Market for Liberty, was written just following a period of intense study of the writings of both Ayn Rand and Murray Rothbard; it has the pace, energy, and rigor you would expect from an evening's discussion with either of these two giants.
Ludwig von Mises: "We must comprehend that it is impossible to improve the economic conditions of the underdeveloped nations by grants in aid. If we send them foodstuffs to fight famines, we merely relieve their governments from the necessity of abandoning their disastrous agricultural policies." - Money, Method, and the Market Process