Pope John XXIII
Pacem in Terris §122
Pacem in Terris: On Establishing Universal Peace in Truth, Justice, Charity, and Liberty
122 It is no small consolation to Us to be able to testify here to the wide acceptance of Our appeal, and We are confident that in the years that lie ahead it will be accepted even more widely. The result We look for is that the poorer States shall in as short a time as possible attain to a degree of economic development that enables their citizens to live in conditions more in keeping with their human dignity.
Source: Pacem in Terris (Vatican.va)