http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Argues that the phenomena of atavistic retrogression do not always indicate true degradation, but that very often they are simply a compensation for considerable development and progress accomplished in other directions. Reptiles have more ribs than we have; quadrupeds and apes possess more muscles than we do, and an entire organ, the tail, which we lack. It has been in losing these advantages that we have gained our intellectual superiority. When this is seen, the repugnance to the theory of genius as degeneration at once disappears. Just as giants pay a heavy ransom for their stature in sterility and relative muscular and mental weakness, so the giants of thought expiate their intellectual force in degeneration and psychoses. It is thus that the signs of degeneration are found more frequently in men of genius than even in the insane. And again, this theory has entered to-day on so certain a path, and agrees so entirely with my studies on genius, that it is impossible for me not to accept it, and not to see in it an indirect confirmation of my own ideas. I find this confirmation in the characters of degeneration recently discovered and still more in the uncertainty of the theories which were at first advanced to explain the problem of genius"--Preface. (PsycINFO Database Record (c) 2005 APA, all rights reserved).