The investigation of the family history of highly talented individuals demonstrates very clearly the effect of biological "bastardization," and shows why it may lead to the production of genius. . . . It results in a complicated psychological structure, in which the components of two strongly opposing germs remain in polar tension throughout life. . . . This polar tension acts as an effective and dynamic factor and produces in the genius the labile equlibrium, the effective super-pressure, that continuous, restless impulsiveness, which carries him far beyond placid, traditional practice and the simple satisfaction of life. On the other hand, in regard to his intellectual abilities, the polar tension creates in the genius his wide mental horizon, the diverse and complicated wealth of his talent, the all-embracing personality. Kretschmer also allies himself with those who hold the concept of genius as closely related to insanity, quoting selected cases in proof: "Bastardization" produces internal contrasts and conflicts, affects tensions, highly strung and uncompensated passions, and a spiritual lability. It consequently creates a predisposition to genius . . . but also [[points]] to psycho-pathological complications. Thus the research on "bastardization" becomes closely interwoven with the old, familiar questions, leading us back to the problem: "Genius and Insanity." BIBLIOGRAPHY 1. ALGER, WILLIAM. _The Genius of Solitude_, page 144. 2. CARREL, ALEXIS. _Man the Unknown_. See pages 140-141. Harper & Brothers, New York; 1935. 3. CHURCHILL, ELLEN SEMPLE. _The Influence of Geographic Environment on the Basis of Ratzel's System of Anthropogeography_. Houghton Mifflin Company, Boston; 1909. 4. DIXON, ROLAND B. _The Racial History of Man_. Charles Scribner's Sons, New York; 1923. 5. ELLIS, HAVELOCK. _A Study of British Genius_. Constable, London; 1927. 6. GALTON, FRANCIS. _Hereditary Genius_. The Macmillan Company, London; 1914. 7. HIRSCH, N. D. M. _Genius and Creative Intelligence_. Sci-Art Publisher, Cambridge, Massachusetts; 1931. 8. KRETSCHMER, E. _The Psychology of Men of Genius_. Translated by R. B. Cattell. Harcourt, Brace & Co., Inc., New York; 1931. 9. LEHMAN, HARVEY C. "The Creative Years in Science and Literature." _Scientific Monthly_ (August, 1936). 10. LOMBROSO, C. _The Man of Genius_. Scott, London; 1891. 11. MILL, JOHN STUART. _Essay on Liberty_. See page 76 ff. The Macmillan Company, New York; 1926 Ed. 12. OVIDIUS NASO, PUBLIUS. _Ars Amatoria_ (_The Love Books of Ovid_). Translated by J. Lewis May. Privately printed for the Rarity Press, New York; 1930. 13. QUETELET, M. _Letters on Probability_. Translated by Downes. Layton & Co., London; 1849. 14. SCHOPENHAUER, ARTHUR. "Essay on Genius," in _The Art of Literature_, Essays of Arthur Schopenhauer. Willey Book Company, New York.