Morris Ginsberg 
Studies in Sociology [PDF ebook] 

First published in 1932, Studies in Sociology consists of essays that fall into three groups, the first concerned with the scope and method of sociology and its relation to history and social philosophy; the second devoted to an analysis of the theory of evolution as applied to society, and to a number of problems in social psychology, such as the nature of social purpose, the place of instinct in social science, the relation between instinct and emotion, and the inheritance of mental characters; while the third group deals with the claims of Eugenics, and social classes and social mobility. This book will be of interest to students of sociology, history and philosophy.