252 CRITIQUES AND ADDRESSES. [xi. 



intelligent and appreciative ; while, sometimes, like that 

 which appeared in the North British Review for 1867, 

 they have a real and permanent value. 



The several publications of Mr. Wallace and Mr. 

 Mivart contain discussions of some of Mr. Darwin's 

 views, which are worthy of particular attention, not only 

 on account of the acknowledged scientific competence 

 of these writers, but because they exhibit an attention 

 to those philosophical questions which underlie all 

 physical science, which is as rare as it is needful. 

 And the same may be said of an article in the Quarterly 

 Review for July 1871, the comparison of which with 

 an article in the same Review for July 1860, is perhaps 

 the best evidence which can be brought forward of the 

 change which has taken place in public opinion on 

 " Darwinism." 



The Quarterly Eeviewer admits " the certainty of the 

 action of natural selection" (p. 49) ; and further allows 

 that there is an a priori probability in favour of the 

 evolution of man from some lower animal form, if these 

 lower animal forms themselves have arisen by evolution. 



Mr. Wallace and Mr. Mivart go much further than 

 this. They are as stout believers in evolution as Mr. 

 Darwin himself; but Mr. Wallace denies that man can 

 have been evolved from a lower animal by that process 

 of natural selection which he, with Mr. Darwin, holds 

 to have been sufficient for the evolution of all animals 

 below man ; while Mr. Mivart, admitting that natural 

 selection has been one of the conditions of the evolution 

 of the animals below man, maintains that natural selec- 

 tion must, even in their case, have been supplemented 

 by " some other cause " of the nature of which, un- 

 fortunately, he does not give us any idea. Thus Mr. 

 Mivart is less of a Darwinian than Mr. Wallace, for he 

 has less faith in the power of natural selection. But he 



