LEADING ARGUMENTS FOR DESCENT l8l 



-where it can offer many solidly founded generalizations on 

 which either sciences can build. 4 



This certainly should help to teach restraint and 

 caution to both scientist and sociologist. &quot;The 

 recapitulation theory,&quot; in fine, says Professor 

 Kellogg &quot;is mostly wrong; and what is right in it 

 is mostly covered up by the wrong part, so that 

 few biologists longer have any confidence in dis* 

 covering the right.&quot; 5 



So exit the &quot;biogenetic principle&quot; that made 

 Haeckel famous, and the &quot;recapitulation theory&quot; 

 which is its expression; though Socialists and not 

 a few sociologists will still continue fondly to 

 accept it, without qualm, as a fact beyond dispute. 



Another argument for the descent of man from 

 the ape is that taken from the resemblance of 

 human blood to that of the higher apes. It is a 

 fact that animals belonging to groups that are 

 closely related in structure give certain blood reac 

 tions that help to identify the group ; thus lizards 

 and snakes give similar reactions, whereas turtles 

 react more like the crocodiles, so that from this 

 point of view, the turtle is said to be only re 

 motely related to the snake or lizard. All 

 ruminants (sheep, deer, oxen) will thus be found 

 to be related by blood-tests; and what is more to 

 the point, the man-like apes give certain reactions 

 similar to those of man. Now what of this? 



* &quot;Darwinism Today,&quot; pp. 22, 23. 

 B Ibid. 



