M Ginsberg & L. T. Hobhouse 
The Material Culture and Social Institutions of the Simpler Peoples (Routledge Revivals) [PDF ebook] 
An Essay in Correlation

Originally published in 1915, this pioneer study has long occupied an important place in the literature of sociology. An exercise in the statistical correlation of the economic and social institutions of the working classes of the early twentieth century, the book is an important link between contemporary sociology, with a focus on the problems of social development, and the classical social liberalism on which L. T. Hobhouse left his mark. The reissue includes the introduction written by Morris Ginsberg in the 1965 reprint, where he explains what he and his colleagues set out to achieve and responds to the criticism faced by the study. This is a classic work which is still of great value to sociologists and anthropologists today.