AUTONOMIC AND HETERONOMIC INFLUENCES. 14! 



forms of these three principles we are able to avail ourselves of the 

 adjectives that have been used in designating the different forms of 

 selection. This is a great aid in presenting the relations between the 

 four principles in their different forms. 



In many of the places where the sign v (meaning caused by) is used 

 after the forms of reflexive selection, it might with equal correctness 

 be changed to /. (meaning causing). For example, social selection 

 may be described on the one hand as depending on the coordination 

 of social instincts and qualities, and on the other hand as building 

 up and maintaining the social instincts and the characters on which they 

 depend. Taking a special case: Without any possible method of 

 recognizing each other there could be no social selection ; but, on the 

 other hand, when a new race is formed, it is social selection that seizes 

 on some new and fluctuating character, emphasizing, intensifying, 

 and rendering it permanent ; and so, in an important sense, it may be 

 said that social selection produces the recognition marks and calls 

 and coordinates them with the special instincts of the race that recog- 

 nize these marks and respond to these calls. 



II. AUTONOMIC AND HETERONOMIC INFLUENCES. 

 1 . A utonomic Influences Include Endonomic and Reflexive Influences. 



The nomenclature given in this volume calls attention to the fact 

 that cndonomic selection is determined by habitudes and aptitudes for 

 dealing with the environment, and is subject to diversity without any 

 corresponding diversity in the environment; and that the forms of 

 reflexive selection are determined by the necessity for sexual, social, 

 and other coordinations between the members of the same intergen- 

 erating group, also undergoing change without reference to change 

 in the environment. The forms of endonomic and reflexive selection 

 are, therefore, brought together under the term autonomic selection, 

 which sets them in strong contrast with heteronomic selection, which 

 is always determined by conditions in the environment surrounding 

 the intergenerating group. But the effects of changes of activities 

 within the intergenerating group, and not depending on changes in 

 the environment, are not all covered by autonomic selection. We 

 must also consider the autonomic forms of isolation, election, arid 

 partition, for they are all of importance in segregating and molding 

 the types of allogamic organisms. 



Autonomic isolation includes both endonomic isolation, produced 

 by industrial, chronal, and migrational isolation, and reflexive isola- 

 tion, produced by sexual and social instincts, by impregnational 

 incompatibilities, and by institutional requirements. It is in contrast 

 with heteronomic isolation, which is determined by conditions outside 



