i6 WHAT EVOLUTION IS 



win's '^ Origin of Species," the storm 

 broke afresh, this time not to be 

 turned aside till it had swept the 

 shores clear of the wreckage of old 

 ideas. 



Everyone knows the great public 

 upheaval that followed the appearance 

 of the "Origin of Species." The 

 scientific world had been prepared for 

 it by a paper on the theory of natural 

 selection, published by Darwin and 

 Wallace in the preceding year; but 

 considering the long period of rela- 

 tive quiescence that had preceded 

 1859, even scientists must have been 

 startled at the uproar that broke 

 forth. Darwin and his able coadju- 

 tor, Huxley, had the double task of 

 showing to the world that, in contrast 

 with special creation, descent with 

 modification had taken place, and that 

 natural selection was the driving 

 force behind this process. In the 



