 Hart’s proposal was the harbinger of a revival of these sorts of theories, first among legal theorists and then to moral philosophers more generally. One of the earliest and most influential authors to take up Hart’s idea is Joseph Raz. First appearing in his 1977 essay “Promises and Obligations” (Raz 1977) and later in his book The Morality of Freedom (1986) and elsewhere (see Raz 1982, 2014) Raz advances a normative power view that explicitly grounds the promissory power in our interests in self-binding for cooperation and coordination: