So it is questionable whether we have not only a right to forceful protective measures but also a right to take those measures ourselves. If the right to do so has been delegated to the police and, in case of foreign invasion, to the military, then our right to self-defense is further qualified. We have, in fact, partly delegated the job of protecting our security to the police and military in the interest of a well-ordered society. So the qualified right to self-defense comes to this: a right to defend oneself when doing so (1) does not wrongly harm others or violate their rights and (2) is necessary to protect one's security and/or rights because such protection isn't otherwise forthcoming.