It is interesting and kind of sad that this discussion of survival has focused on the standard, rather weary survivalist scenarioin which society collapses, we all turn to violence in protecting our stash from those who would take it and we go down the rabbit hole of how much ammo, what caliber, etc.
Committing a violent act to survive is not what I considered when I write the opening post; nevertheless, all answers members have posted are valid.
Jeanette Isabelle