2 8o GRAND STRATEGY OF EVOLUTION 



gradient action, in which the actors have the most 

 profitable functional relations, both to one another and 

 to the asymmetrical system of gradient action in the 

 outer world. 



The consistent architectural growth of this particu- 

 lar action system throughout the whole range of geo- 

 logic and embryologic history is what we call The 

 Great Highway of Animal Evolution. 



The evolution of this system is the resultant of a 

 cumulative directive restriction and compulsion, which 

 is expressed architecturally in a progressive upbuild- 

 ing, or growth tropism, wherein the organic architec- 

 tural elements react to nature's content in a more and 

 more self-constructive, or profitable, way. 



The basic difference between the life of a single cell 

 leading an independent existence, and the life of a hu- 

 man being, lies in the fact that in man there are many 

 millions of cells united in a common constructive serv- 

 ice; each cell leading its own individual life, yet serv- 

 ing all the others, and in turn served by them; all con- 

 tributing something to the sum total of what we call the 

 individual man, and all cooperating to make him a more 

 effective servant to other individuals, human and other- 

 wise. 



No one cell in the human body, so far as we know, 

 does anything essentially better, or more difficult, than 

 the others, or than the things a single vagabond cell 

 may do. But when millions of cells are united to form 

 one organic body, with common interests and common 

 dangers; a common origin and a common destiny; with 

 justly divided labors duly performed and welfare mu- 



