290 GRAND STRATEGY OF EVOLUTION 



of things, and all their parts, to exist, must move, hold, 

 or sustain, something else, and be moved, or sustained, 

 by them. 



The serviceability of any system, mental or physi- 

 cal, is its power to save itself, and give itself, as an al- 

 truistic agent, to the construction of something else. 

 To grow in stability and serviceability, it must increase 

 the number, variety, continuity, and Tightness of its 

 self-sustaining services, draw to itself new servants, 

 and perform for them more and better services. 



IV. Mental Imagery as a Self -Constructive Function 



Intelligence may be regarded as a constructive re- 

 sponse, not of any one organ, but of the whole organism, 

 to its outer world. 



As this functional response expresses the coopera- 

 tive action of discrete physical and organic systems, it 

 must await the creation of the various parts and instru- 

 ments of those systems before it can itself be manifest. 

 Intelligence becomes more and more manifest with the 

 growth of these physical instruments and the increase 

 of their creative returns. 



The purpose of intelligence, like that of every other 

 function, is manifest in what it does, or accomplishes. 

 In this case, it is to discover the right ways to do 

 things in order that the body may do them rightly, or 

 self-constructively; in other words, in order to find, 

 appropriate, and rightly use what is good, or self- 

 creative and self-saving, and to avoid what is evil, or 

 destructive. 



Those things, therefore, which do possess a measure 

 of intelligence, in some way must have conserved in 



