The state is nothing but a monopoly on the legitimate use of violence.
Which, ideally, is pretty much how it has to work. The state is, ideally, composed of elected representatives and their appointees. The alternative to violence monopolized by elected representatives is violence distributed to private interests. State monopoly of legitimate violence is not great and I agree with the problems inherent to that, but realistically the alternative seems worse. I'm racking my brain for another system, but I can't think of anything that doesn't devolve to oligarch-led private armies oppressing people.