As in relationships between individuals, people cannot pursue their own interests to the detriment of others; similarly, states must not seek their own development in ways that carry injustice or oppression of another state; otherwise, they commit wrongdoing against it. Here it is appropriate to recall the saying of St. Augustine: "If justice is removed, what are states but large-scale robberies."
(John XXIII /1881–1963/, encyclical Pacem in terris, no. 92; April 11, 1963)