78 Today, Venerable Brethren, all men are looking with terror into the abyss to which they have been brought by the errors and principles which We have mentioned, and by their practical consequences. Gone are the proud illusions of limitless progress. Should any still fail to grasp this fact, the tragic situation of today would rouse them with the prophet's cry: "Hear, ye deaf and ye blind, behold" ( Isaias xlii. 18). What used to appear on the outside as order, was nothing but an invasion of disorder: confusion in the principles of moral life. These principles, once divorced from the majesty of the Divine law, have tainted every field of human activity.
Source: Summi Pontificatus (Vatican.va)