120 SOCIAL EVOLUTION 



SUPPLEMENTARY READINGS. 



BAGEIIOT, "W. Physics and Politics. 

 COOLEY, C. H. Social Organization. 

 GIDDINGS, F. H. The Principles of Sociology. 

 GIDDINGS, F. H. Descriptive and Historical Sociology. 

 GUMPLOWICZ, L. The Outlines of Sociology. 

 KROPOTKIN, P. Mutual Aid. 

 SUMNER, W. G. Folkways. 



