Lieber 



and historical development, with which all matter is endowed and by which all 

 aspects of matter are joined to the immutably constant features of nature, i.e., 

 the universals, and by which they are mutually unified. The origin of the uni- 

 versal process of evolution which constantly prevails in all matter and conse- 

 quently in such materials which we have by convention tried to distinguish as 

 biological and physical, resides in force. This means that the forces of evolu- 

 tion (and historical development) in living materials, as well as those which we 

 identify with physical reality through the laws of physical theory, and to which 

 we here ascribe evolution in physical reality, are one. All forces in nature are 

 therefore essentially equivalent insofar as they are the essential causal connec- 

 tion between all historically developing events, which they motivate as aspects 

 of a viniversal process of evolution. The motivating power of all forces is as- 

 cribed here to the constant and immutable dynamism with which the universals 

 are innately endowed, and in which forces are understood to emerge. They are 

 all equivalently endowed with evolutionary thrust and historical commitment; in 

 a sense, therefore, the notion of elan vital pertains to all forces. Consequently, 

 rather than suggesting an ambiguous and false distinction between inanimate and 

 animate nature, its usage here emphasizes that all forces in nature are equally 

 endowed with an innate dynamism derived from the universals, and that they are 

 the basis of all causal relations that lead to historical development in all nature. 



PHYSICAL ASPECTS OF EVOLUTION 



The principle of maximum uniformity and the principle of universal corre- 

 spondence jointly imply that force is the essential instrument that unifies nature 

 in its various phenomenological manifestations and joins them with the univer- 

 sals which are the source of the power by which the forces jointly motivate a 

 universal process of evolution. As stated in the previous section, this concept 

 has motivated a search to identify, both conceptually and experimentally, aspects 

 of the universal process of evolution revealed in natural phenomena which are 

 now supposed to be fully accounted for by widely accepted physical theories. In 

 this search, for conciseness, we shall cautiously refer to aspects of evolution 

 which are revealed in such natural phenomena, as 'physical aspects of evolution.' 

 We say cautiously, because in the previous section we concluded that physical 

 reality bears a total correspondence to biological reality, and that therefore 

 they are essentially and completely equivalent. We shall examine here certain 

 examples of the physical aspects of evolution which concern the historical de- 

 velopment of actual flow fields that evolve from real boundary conditions, i.e., 

 flow fields actually produced in historical time. We also have the task of devel- 

 oping their analytical representations on the basis of the Navier-Stokes equa- 

 tions and realistic boundary conditions. We shall consider a fundamental geo- 

 physical aspect of the principle of maximum uniformity which led to the 

 discovery of a primary seismic driving force, and to its identification with the 

 earth's rotation. This primary seismic driving force extends throughout the 

 earth and constantly motivates historical and thus evolutionary changes in its 

 tectonic structure, in its figure, surface features, physical constitution, and 

 distribution of internal forces. 



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