From the Office of Readings for Saturday of the 1st Week in Ordinary Time:
The modern world shows itself at one and the same time both powerful and weak, capable of the noblest deeds or of the foulest. Before it lies the path to freedom or to slavery, to progress or decline, to brotherhood or hatred. Moreover, man is becoming aware that the forces which he has unleashed are in his own hands, and that he himself must either control them or be enslaved by them. That is why he is putting questions to himself.
The dichotomy affecting the modern world is, in fact, a symptom of the deeper dichotomy that is in man himself.
From the Constitution of the Second Vatican Council on the Church in the Modern World.
It was true when the document (also known by its Latin title Gaudium et Spes) was written in the 1960s; it remains true today at the nascent years of the 21st century.