Let’s start with a thought experiment. Suppose I push you into deep water as part of a swimming lesson. Because you do not know how to swim, you start desperately trying to keep yourself afloat, but to no avail. Now suppose further that I do nothing to rescue you, and as a result, you drown. My actions in this scenario are tantamount to murder. I intentionally placed you in a situation of great vulnerability and then refused to provide for you. Your rights were egregiously violated by my refusal to do anything.
The moral principle behind this thought experiment is the following: if I knowingly cause you to exist in a state of great need or vulnerability, then I am responsible for providing for you. If I do not, then I am negligent. If my negligence leads to your death, then I am guilty of murder.
This principle is enshrined in the legal system as part of the state-created danger doctrine. If the government does something that puts someone into a position of danger, it bears a special responsibility to provide for that individual’s safety. If it fails to do this, then it may be held liable for any harms that result.
What’s This Got to Do with Gun-Free Zones?
This principle has direct relevance for so-called “gun-free zones.” These are locations in which the government has declared, using the threat of punishment to force compliance, that carrying firearms is prohibited. In coercively requiring us to disarm, the government intentionally handicaps our ability to effectively and reasonably protect ourselves.