Ayn Rand's philosophy of Objectivism has been and continues to be a major influence on the right-libertarian movement, particularly libertarianism in the United States. Many right-libertarians justify their political views using aspects of Objectivism. Philosophical disagreements Aggression Some right-libertarians, including Murray Rothbard and Walter Block, hold the view that the non-aggression principle is an irreducible concept: it is not the logical result of any given ethical philosophy, but rather is self-evident as any other axiom is. Rand argued that liberty was a precondition of virtuous conduct, but that her non-aggression principle itself derived from a complex set of previous knowledge and values. For this reason, Objectivists refer to the non-aggression principle as such while libertarians who agree with Rothbard's argument call it "the non-aggression axiom". Rothbard and other anarcho-capitalists hold that government requires non-voluntary taxation to function and that in all known historical cases, the state was established by force rather than social contract. Thus, they consider the establishment and maintenance of the night-watchman state supported by Objectivists to be in violation of the non-aggression principle. On the other hand, Rand believed that government can in principle be funded through voluntary means. Voluntary financing notwithstanding, some libertarians consider that a government would by definition still violate individual rights (commit aggression) by enforcing a monopoly over a given territory. Objectivism's rejection of the "primitive" In her biography Goddess of the Market: Ayn Rand and the American Right, Jennifer Burns notes how Rand's position that "Native Americans were savages" and that as a result "European colonists had a right to seize their land because native tribes did not recognize individual rights" was one of the views that "particularly outraged libertarians". Burns also notes how Rand's position that "Palestinians had no rights and that it was moral to support Israel, the sole outpost of civilization in a region ruled by barbarism" was also a controversial position amongst libertarians, who at the time were a large portion of Rand's fan base. Foreign policy Libertarians and Objectivists have disagreed about matters of foreign policy. Following the Arab-Israeli War of 1973, Rand denounced Arabs as "primitive" and "one of the least developed cultures" who "are practically nomads". She said Arab resentment for Israel was a result of the Jewish state being "the sole beachhead of modern science and civilization on their continent" and referred to the Israelis as "civilized men fighting savages". Later Objectivists, such as