Ayn Rand's philosophy of Objectivism has been and continues to be a major influence on the libertarian movement, particularly in the United States. Many libertarians justify their political views using aspects of Objectivism. However, the views of Rand and her philosophy among prominent libertarians are mixed and many Objectivists are hostile to libertarians in general.
Some 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, too, argued that liberty was a precondition of virtuous conduct, but argued 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. They thus 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.
Jennifer Burns in her biography Goddess of the Market: Ayn Rand and the American Right, 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.