A major one which no one can overlook is technological and based on inventions and discoveries which have altered the whole basis of production and deeply affected social relations.
No honest writer today can possibly avoid being influenced by Freud through his pioneering work into the Unconscious and by the influence of those discoveries on the scientific, philosophic, and artistic work of his contemporaries: but not, by any means, necessarily through Freud’s own writing.
What is clear is that the Gospel of Judas has joined the other spectacular discoveries that are exploding the myth of a monolithic Christianity and showing how diverse and fascinating the early Christian movement really was.
Another cause of change, one less noticeable but fundamental, is the modern growth of population closely connected with scientific and medical discoveries. It is interesting that the United Nations has set up a special Commission to study this question.
The great problems of the Twentieth century will have immediate relation to the discoveries of America, of Africa, and of Australia.