Propertarianism, or proprietarianism, is a political philosophy that reduces all questions of ethics to the right to own property. On property rights, it advocates private property based on Lockean sticky property norms, where an owner keeps their property more or less until they consent to gift or sell it, rejecting the Lockean proviso. Closely related to and overlapping with right-libertarianism, it is also often accompanied with the idea that state monopoly law should be replaced by market-generated law centered on contractual relationships. Propertarian ideals are most commonly cited to advocate for an anarcho-capitalist or minarchist society with governance systems limited to enforcing contracts and private property. According to its advocates, propertarianism is synonymous with capitalism. The term appears to have been coined by Edward Cain in 1963: Since their use of the word "liberty" refers almost exclusively to property, it would be helpful if we had some other word, such as "propertarian," to describe them. [...] Novelist Ayn Rand is not a conservative at all but claims to be very relevant. She is a radical capitalist, and is the closest to what I mean by a propertarian. Marcus Cunliffe defined propertarianism in his 1973 lectures as "characteristic values of American history" in regard to property. Philosopher Robert Nozick formalized Locke's approach in his book "Anarchy, State, and Utopia" with the Entitlement Theory of Justice, specifying criteria for just original acquisition, just transfer, and rectification. David Boaz writes that the "propertarian approach to privacy", both morally and legally, has ensured Americans' privacy rights. Markus Verhaegh states that Rothbardian anarcho-capitalism advocates the neo-Lockean idea that property only legitimately originates from labor and may then only legitimately change hands by trade or gift. Brian Doherty describes Murray Rothbard's form of libertarianism as propertarian because he "reduced all human rights to rights of property, beginning with the natural right of self-ownership".