The non-aggression principle (NAP), also called the non-aggression axiom, is the legal or moral rule that states that any person is permitted to do everything with his property except aggression, which is in turn defined as the initiation of forceful action, which is in turn defined as ‘the application or threat of’ ‘physical interference (property breach) or fraud (contract breach)’, any of which without consent. The principle is also called the non-initiation of force. The principle incorporates universal enforceability.
The non-aggression principle is a central idea in libertarianism, and minarchism and a fundamental principle in voluntaryism, anarcho-capitalism (legitimate force theory) and international law, namely just war theory
https://en.wikipedia.org/wiki/Non-aggression_principle