... they begin to bear any kind of resemblance to man as we know him today. The very methods of reproduction of those primitive forms differed from those of humanity today, and far more resembled those which we now find only in very much lower types of life. Man in those early days was androgynous, and a definite separation into sexes took place only about the middle of the third round. From that time onward until now the shape of man has been steadily evolving along definitely human lines, becoming smaller and more compact than it was, learning to stand upright instead ... — A Textbook of Theosophy • C.W. Leadbeater