It must be noted that the non-aggression alone can never be the starting point in justifying moral behavior or serving as a fundamental principle of ethics. There must be a justification of the non-aggression principle before such a case can be made. The very implication of the term “principle” implies that non-aggression serves as the foundation for a system of ethics, which it cannot be. It is certainly not an axiom since it is not a self-evident truth.
Daniel Alexander Brackins, Private Property, Law, and the State
axiom, ethics, non-aggression-principle