Robert Briffault 
Psyche”s Lamp [PDF ebook] 
A Revaluation of Pyschological Principles as Foundation of All Thought

Originally published in 1921, Psyche”s Lamp reminds the reader that all thought and discussion, to whatever aspect of confronting problems, social, political, ethical, vital and personal, they may be directed, posit psychological premises. In the darkness and confusion of a human world under reconstrction, where immemorial landmarks lie strewn and buried under the debris of collapsed super-structures, we shall vainly endeavour to thread our way to any purpose unless we can pierce the obscurity by the light of Psyche”s lamp.