Non-aggression principle

The Non-Aggression Principle (NAP), also called the Non-Aggression Axiom, the non-coercion principle, the non-initiation of force and the zero aggression principle, is a concept in which "aggression" – defined as initiating or threatening any forceful interference with either an individual or their property,[note 1] or agreements (contracts) – is illegitimate and should be prohibited.[1][2] Interpretations of the NAP vary, particularly concerning issues like intellectual property, force, and abortion.

The Non-Aggression Principle is considered by some to be a defining principle of libertarianism in the United States[3] and is also a prominent idea in anarcho-capitalism, voluntaryism, and minarchism.[4][5][6][7][non-primary source needed]


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  1. ^ Long, Roderick (2008). "Nonaggression Axiom". In Hamowy, Ronald (ed.). The Encyclopedia of Libertarianism. Thousand Oaks, CA: SAGE; Cato Institute. pp. 357–60. doi:10.4135/9781412965811.n219. ISBN 978-1-4129-6580-4. LCCN 2008009151. OCLC 750831024. ...except in response to the initiation ... of similar forcible interference ....
  2. ^ Zwolinski, M. (2016). THE LIBERTARIAN NONAGGRESSION PRINCIPLE. Social Philosophy and Policy, 32(2), 62-90. doi:10.1017/S026505251600011X
  3. ^ Phred Barnet. "The Non-Aggression Principle (Americanly Yours, April 14, 2011)". Retrieved November 22, 2011.
  4. ^ "The Morality of Libertarianism". The Future of Freedom Foundation. October 2015. Retrieved 2016-03-16.
  5. ^ "The Non-Aggression Axiom of Libertarianism". Lew Rockwell. Retrieved 2016-03-22.
  6. ^ "What is the "non-aggression principle"?". Advocates for Small Government. Retrieved 2016-03-22.
  7. ^ "Discovering Libertarianism – Non-Aggression Principle". Young Americans for Liberty. Archived from the original on 2016-04-09. Retrieved 2016-03-22.