In his 1967 encyclical, "Populorum progressio" ("On the Development of Peoples") Pope Paul said, "...lay people must consider it their task to improve the temporal order. While the hierarchy has the role of teaching and authoritatively interpreting the moral laws and precepts that apply in this matter, the laity have the duty of using their own initiative and taking action in this area—without waiting passively for directives and precepts from others." He reiterates this "Octogesima adveniens", "Let each one examine himself, to see what he has done up to now, and what he ought to do. It is not enough to recall principles, state intentions, point to crying injustice and utter prophetic denunciations; these words will lack real weight unless they are accompanied for each individual by a livelier awareness of personal responsibility and by effective action."