All social compacts are ultimately backed with force. If you and a dozen people fucked off to SeaLand and lived in an anarchic commune, your agreements with one another would _still_ ultimately be backed by force, in the same way that everything here is: Your SeaLand commune agrees on some principles for behavior - say, no pushing other people; someone in the group decides to push other people; the group intervenes, attempts to talk the person out of pushing other people; the Pusher refuses to see reason; the group either resorts to force or abandons the commune to a pushocracy. If you want to argue the government is illegitimate, then go ahead, but to just point vaguely to "socially defined rules are backed by force" isn't really _saying_ anything without that.