The present encyclopedia on Social Science is useful to students, teachers and research scholars of our country. This encyclopedia is complete in each and every aspect and specially prepared for developing countries. Some of the salient features of this encyclopedia are as follows: The theoretical discussion throughout the text has been simplified, so that the students get an insight into logic behind the concepts and procedures. The present encyclopedia is prepared to include latest syllabus of our UGC. The subject matter of the present encyclopedia is expected to provide greater variety and assist understanding of readers. All chapters have been very carefully graded.