This is the only reason it is necessary, to protect. That means that the managing of the police, courts, military should be government's only function, for if they do anything else it will be at the expense of liberty, taking from one to give to another or "society". The Constitution protects most liberties, but not all of them; therefore it is possibly for a law to be constitutional but not liberty minded, a good example is Romneycare.
It is an enormous simplification to speak of the American mind. Every American has his own mind.
~Ludwig von Mises