Chapter XVI: Heredity in Man 356

(1) Recent work in heredity leads to the conclusion that at the
basis of all human characters lies a vast number of
unit-factors; but few have yet been recognized, and (2) we have
to depend upon statistical data, which show that all mental and
physical characters are inherited. Further discussion of the
inheritance of (3) disease, (4) temperament, (5) instinct, and
(6) intellect. (7) Conclusion.