316 GENETICS 



I. Persons of genius; 



II. Persons of special skill, intelligence, courage, 

 unselfishness, enterprise or strength; 



III. Persons constituting the great normal middle 



class, the "people"; 



IV. Socially inadequate persons. 



The first three groups constitute those eugenically 

 fit from sterling inheritance, who produce the socially 

 valuable nine-tenths of humanity among civilized peo- 

 ple, and in the last group are the eugenically unfit from 

 defective inheritance who produce the socially inade- 

 quate or the "submerged tenth" of humanity. 



Among persons of genius Dr. Laughlin would in- 

 clude the 5000 persons most splendidly equipped by 

 nature throughout historic times, as, for example, 

 Aristotle in philosophy, Newton in science, Pasteur in 

 medicine, Dante in poetry, Shakespeare in drama, and 

 Cecil Rhodes in business. Reckoning that since civili- 

 zation began there have been born and reared in civil- 

 ized countries approximately thirty billion persons, the 

 expectation of a genius is about 1 : 6,000,000. 



In the second group are included the "natural and 

 acknowledged leaders in all lines of human endeavor, 

 the "Who's Who people." The incidence of these in 

 the total population is possibly 1 : 6,000. 



The third group, the "people," constitute nine- 

 tenths of all, since the first two classes, although their 

 influence is very great, are numerically negligible, 

 while the fourth group is made up of the residue or the 

 socially inadequate, namely, (1) feeble-minded; (2) 



