However much people may disagree on the how big the state should be, it is almost universally acknowledged that “national defence” – the protection of the citizenry from invasion by foreign states – is regarded not only as the primary function of the state but also its very raison d'être. Indeed, together with domestic security and protection from private criminals, such a function is joined at the hip with the state’s monopolistic use of force. Thus, it is difficult to imagine how, without this function, the state could exist as a distinct institution.
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