The Psychology of Man's Possible Evolution

SOME YEARS ago I began to receive letters from readers of my books. All these letters contained one question, what I had been doing after I had written my books, which were published in English in 1920 and 1931, and had been written in 1910 and 1912. I could never answer these letters. It would have needed books, even to attempt to do this. But when the people who wrote to me lived in London, where I lived after 1921, I invited them and arranged courses of lectures for them. In these lectures I tried to answer their questions and explain what I had discovered after I had written my two books, and what was the direction of my work. In 1934 I wrote five preliminary lectures which gave a general idea of what I was studying, and also of the lines along which a certain number of people were working with me. To put all that in one, or even in two or three lectures, was quite impossible: so I always warned people that it was not worth while hearing one lecture, or two, but that only five, or better ten lectures could give an idea of the direction of my work. These lectures have continued since then, and throughout this time I have often corrected and rewritten them.