SPENCER AND EVOLUTION. 



4 l 



work of the " Principles of Sociology " upon which he has now entered, 

 and the first part of which is issued. 



Let us now recapitulate his labors in the order of their accomplish- 

 ment, so as to bring them into one view : 



ssis, V 



Letters on the Proper Sphere of Government, 



(Occupied several years as a Eailroad Engineer.) 

 Planned Social Statics, .... 

 Social Statics published, .... 



Theory of Population, 



The Development Hypothesis, 



Philosophy of Style, 



Over-Legislation, ) 



The Universal Postulate, ) 



Manners and Fashion, 



The Genesis of Science, 



The Art of Education, 



Evolution first conceived as Universal, 



Principles of Psychology, 



(Breakdown of eighteen months.) 



Progress, its Law and Cause, 

 Origin and Function of Music 

 Transcendental Physiology, 

 Representative Government, 



State Tamperings with Money and Banks, 



Moral Education, 



The Nebular Hypothesis, 



Archetype and Homologies of the Vertebrate Skeleton, 



Evolution first conceived as the Basis of a System of Philosophy, 



The Laws of Organic Form, 



Physical Education, 



What Knowledge is of most Worth, 



Illogical Geology, 



Prospectus of the System of Philosophy drawn up, 



The Emotions and the Will, 



The Social Organism, 



The Physiology of Laughter, 



Parliamentary Reforms, 



Prison Ethics, 



Prospectus of the Philosophical System published, 



First Principles, 



Classification of the Sciences, 



Principles of Biology, 



Principles of Psychology, 



1842 



1846 

 1850 



1852 

 1853 



1854 

 1855 



1857 

 1858 



1859 



The Study of Sociology, ) . 

 Descriptive Sociology, ) 



Principles of Sociology, Part I.. 



1860 



1862 

 1864 



1867 

 1872 



1873 



1874 



The facts now presented, I submit, entirely sustain the view with 

 which we set out, in regard to the character of Mr. Spencer's work, 

 and his position in the world of thought. It has been shown that he 

 took up the idea of Progress while it was only a vague speculation, 

 and had not yet become a subject of serious scientific study. We 

 have seen that he verified its reality by gradually tracing its operation 



