 Suppose we have adequately answered the question of which tasks states ought to be perform in order to perform their socially necessary functions. We then need to identify which rights they needed in order to be able to perform such tasks? Anscombe refers to the right to have what is necessary for the role, but what is that? Hume thought it obvious that political society could not exist without “exact obedience of the magistrate” but this is surely empiricism without the facts. Legal systems do tolerate a certain amount of disobedience without this hampering their capacity to function (Green 1988: 228–230).