Never-mind the military-industrial complex. A nation-state is in itself a monopoly on sanctioned-violence expressed through your local police department or standing Army. Property rights, human rights, taxes, and everything funded by government revenue is only possible because of the guys with the guns projecting government Force.

This isn't a metaphysical question, this is literally how modern governments are able to exist and operate at scale and how your dollar bills or local equivalent have any value at all.