198 HEREDITY IN RELATION TO EUGENICS 



B. Social Barriers 



The second set of barriers is social. These barriers are 

 extremely numerous and complex. There is the barrier of 



I 



'Op 



Fig. 173. — Inheritance of a neuropathic taint in a highly inbred family, 



1, 1, 2, Ferdinand and Isabella of Spain. II, 2, 4, two daughters, Joanna who 

 was insane and Mary; II, 1, 3, their respective consorts, PhiHp, a weak man 

 and Emanuel also weak; III, 1, is Charles V a great ruler but eccentric, cruel, 

 and subject to melanchoha; III, 2, is Isabel; III, 3, is John III of Portugal, 

 a weak man; III, 4, Catherine; IV, 1, is Philip II, morose, sluggish, cruel; IV, 



2, is Mary; V, 1, is Don Carlos, "one of the most despicable and unfortunate 

 specimens of humanity in modem history." I (within the symbols) insane. 

 Woods, 1906, pp. 145, 146. 



the clan and pride of blood, the barrier of language, the 

 barrier of race, and the barrier of religious sect, 



a. The Barrier of the Clan with its pride of blood leads to 

 self-satisfaction and not infrequently to a desire to concen- 

 trate wealth and power. This is the barrier that has led 

 the royal families of Europe to inbreed with such disastrous 

 effect, as illustrated by the house of Spain (Woods, 1902, 

 p, 3), Fig, 173. The barrier of the clan is causing the down- 

 fall of more than one of America's grand families. The 



