In a sense the present work is to be regarded as a secondary-study of the work of a group of writers in the field of social theory. But the genus "secondary study" comprises several species; of these an example of only one, and that perhaps not the best known, is to be found in these pages.
The primary aim of the study is not to determine and state in summary form what these writers said or believed about the subjects they wrote about. Nor is it to inquire directly with reference to each proposition of their "theories" whether what they have said is tenable in the Hght of present sociological and related knowledge. Both these questions must be asked repeatedly, but what is important is not so much the fact that they are asked, or even answered, but the context in which this takes place.