7 Far different from this is the behaviour of men today. Never perhaps was there more talking about the brotherhood of men than there is today; in fact, men do not hesitate to proclaim that striving after brotherhood is one of the greatest gifts of modern civilization, ignoring the teaching of the Gospel, and setting aside the work of Christ and of His Church. But in reality never was there less brotherly activity amongst men than at the present moment. Race hatred has reached its climax; peoples are more divided by jealousies than by frontiers; within one and the same nation, within the same city there rages the burning envy of class against class; and amongst individuals it is self-love which is the supreme law over-ruling everything.
Source: Ad Beatissimi Apostolorum (Vatican.va)