Pope John XXIII
Pacem in Terris §135
Pacem in Terris: On Establishing Universal Peace in Truth, Justice, Charity, and Liberty
135 We are thus driven to the conclusion that the shape and structure of political life in the modern world, and the influence exercised by public authority in all the nations of the world are unequal to the task of promoting the common good of all peoples.
Source: Pacem in Terris (Vatican.va)