EVOLUTION AND HUMAN DESTINY 



person, than one may care to admit. But before enter- 

 ing into that discourse, some of the features of colony 

 formation among creatures other than man, must be 

 discussed. 



On the lower levels, where integration of complexi- 

 fying units of matter takes place, some knowledge of 

 the forces bringing about this integration exists. As 

 has been discussed on preceding pages, these forces are 

 valence and resonance forces determined by atomic 

 and molecular structures. The action of these forces is 

 most clearly seen in the case of crystal structure; less 

 apparent but still yielding to analysis in the case of 

 colloid formation. In the especially complex protein 

 polymers with their unusually highly developed ability 

 to re-synthesize their own structure, the pertinent role 

 of recognizable molecular forces becomes obscure. 

 That is the present situation on the "virus level." On 

 the next higher level of integration leading to the 

 development of living cells, nothing is presently known 

 about the existence of physico-chemical forces produc- 

 ing the integration. Yet on the still higher level of the 

 colony formation of cells (which may have given rise 

 to the multicellular organism) , something about the 

 factors leading toward the integration is again known. 

 However on this level structural complexity has already 

 become so great that description of the integrating 

 forces in terms of chemical reactions is not possible 

 within the limitations of present knowledge. It is easier 



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