For a book that I rate only second in importance within evolution theory to Darwin's "Origin" as joined with its supplement, "Descent of Man", and as, in my opinion, undoubtedly one of the greatest books of the present century, the appearance of a variorum version of the Genetical Theory of Natural Selection is a major event ... In some ways some of us have overtaken Fisher; in many, however, this brilliant, daring man is still far in front.