Human Action: The Scholar's Edition/relativism
From Critiques Of Libertarianism
The notion of right and wrong is a human device, a utilitarian precept designed to make social cooperation under the division of labor possible. All moral rules and human laws are means for the realization of definite ends. There is no method available for the appreciation of their goodness or badness other than to scrutinize their usefulness for the attainment of the ends chosen and aimed at
Ludwig von Mises, "Human Action: The Scholar's Edition" p. 716.