13O ANALYSIS OF THE FOUR PRINCIPLES (CONTINUED). 



What is usually called the amalgamation of races is regressive isola- 

 tion. It is a form of racial demarcation, in which the boundaries are 

 so changed that two or more slightly divergent varieties or races are 

 interfused and become one. But, as I have already suggested, the 

 limits within which regression of this kind can take place are compar- 

 atively small. 



Regressive partition takes place when divergent forms of civiliza- 

 tion become commingled and blended. In the case of human races 

 it often introduces regressive isolation. 



The most familiar of these four regressions is regressive isolation, 

 that is, racial amalgamation, to which Darwin's work on cross and self 

 fertilization has called attention. The chief significance of the prin- 

 ciple lies in its producing a certain limited undoing of isolation and in 

 its giving plasticity and variability to the compounded stock. Amal- 

 gamation usually arises through the entrance of divergent races into 

 the same region before their sexual and social instincts or the physio- 

 logical and structural coadaptations of the sexes have become so 

 divergent as to prevent interfusion. Under such conditions what- 

 ever determines the bringing together of the races in the same region 

 determines the nature of the amalgamation. When human races are 

 brought together in the same region, the rapidity of amalgamation is 

 determined largely by racial instincts and social conditions. 



1 . Reversal oj Partition and Isolation in Man. 



The most remarkable feature in the evolution of civilized man is the 

 reversal of the processes of partition and of isolation and the breaking 

 down of the social and racial segregations that have been progressing 

 for countless generations. The leading factors in this process of 

 coalition are social rather than racial; but the final result will un- 

 doubtedly be a great reduction of the number of races, and possibly a 

 blending of all in one generalized type, resulting from the amalgama- 

 tion of all the races in one. It is, however, possible that the barriers 

 preventing marriage between certain races of men will become more 

 fixed than ever, even though the intercourse of industrial, commercial, 

 and national life becomes increasingly intimate. The era of commer- 

 cial intercourse has been inaugurated and will never be reversed. 

 Again, the smaller nations are being absorbed into the larger nations ; 

 but what the final result will be on the multitude of races and castes 

 can not be easily foretold. 



