"If privacy is an essential component of autonomy, and personal autonomy is such a cherished value for liberals and others, does that mean we must have a right to privacy? Alas, matters are not so simple. It certainly is “not” the case that people enjoy rights over everything that is important to them. In order to determine whether there is a (moral) right to privacy we had first better understand what a right is. The most illuminating conception of rights I know is the Interest Theory proposed by Joseph Raz, in these terms : Definition “X has a right” if and only if X can have rights, and, other things being equal, an aspect of X's well-being (his interest) is a sufficient reason for holding some other person(s) to be under a duty."