Aurora Borealis Iceland Northern Lights Tour & Icelandic Treats Aurora Borealis Northern Lights over Iceland Stock Photo Alamy Aurora borealis over Iceland Stock Image C046 1557 Science Photo Aurora borealis over Iceland Stock Image C048 2603 Science Photo. Modern sociology owes much to Marx: the definition of the field of study, the analysis of the economic structure and its relations with other parts of the social structure, the theory of social classes, and the theory of ideology. Marx worked to transform speculative philosophy into a critical social theory which would be of use to the largest, and most degraded, section of society. The techniques he used, no less than his conclusions, are still worthy of consideration. Published 1969, Pelican Book, A563. Binding of book is tight. Book is wrapped in plastic jacket. Tanning and foxing around edges of book. Foxing on insides of covers. Plastic jacket has imprinted on first and final pages of book. Some tanning of margins of pages. Annotations and underlining on certain pages.