As I understand it the ideal situation is to be self-sufficient, meaning we grow our own food, build our own infrastructure, generate our own power, etc. I assume the population generally will be armed, which will allow us to defend against any potential liberty infringements. But what about threats external to the nation?
What of the threats of foreign militaries looking for some modern conquest? If we are at sea, either on an uninhabited island or on a island we built ourselves, what of the threat of pirates? It is something that must be contended with, as absurd as the concerns might seem.