stages in Human Rvohttion 



Similarly man is a very complex being with 

 a history far longer than that of any mountain. 

 His organs are of very different ages; some very 

 old, others of quite recent origin. They have 

 been formed under different conditions and to 

 meet different emergencies. Could we know 

 his history, we should understand him far 

 better. We should appreciate, for instance, 

 the struggle between the old and the new, 

 the low and the higher, the brutal and the 

 spiritual. 



It is not necessary to write a complete history 

 of either his physical or m_ental evolution. But 

 certain peculiarities of structure in higher ani- 

 mals point so clearly to earlier and lower stages 

 for their origin that we may feel fairly certain 

 that man has passed that way, and we must 

 glance at a few of them. 



Our sketch naturally falls into two portions. 

 First we must trace the stages of development of 

 the individual man. The earlier part of this 

 portion will show the rise of almost purely physi- 

 cal organs — stom.ach, heart, m-uscles, etc. As we 

 follow the evolution of the body, we cannot fail 

 to notice how the appearance of more powerful 

 and complex and finer muscles, the swifter loco- 



23 



