Joseph Raz's The Morality of Freedom1 is full of subtle, original, and thought provoking arguments. It also manifests abundantly Raz's philosophical good sense and sensitivity to the complexities of the moral life. These are reasons enough to class it with the handful of genuinely important books whose appearance in the last two decades has constituted a renaissance in political philosophy. But in my opinion, Raz has another, and even stronger claim on our attention: He comes closer to the truth about political morality than anyone has for nearly a century. (Possibly much longer, but we need not attempt to decide exactly who last did as well as Raz.)
Regan, Donald H. "Authority and Value: Reflections on Raz's Morality of Freedom." S. Cal. L. Rev. 62 (1989): 995-1095.