The two distinct disciplines of social science sociology and political sciences do converge often as the subject matter is men and the convergence is on the increase. A beginning was made with the works of Marx.
According to him political institutions and behavior are closely linked with the economic system and social classes.Provoked by this thinking some thinkers by the end of the 19th century pursued the matter in more detail like studies of political parties, elite, voting behavior, bureaucracy and political ideologies as in the political sociology of Michels, Weber and Pareto.By then another development occurred in America known as behavioral approach to political phenomena. This was initiated by the University of Chicago. In the 30s attempts were made by various scholars to create a scientific discipline of behavioral politics.
In another area there is c lose relationship between the two. Both functionalism and social system have been adopted into politics. There is a renewal of interest in Marxist sociological ideas. It is interesting to note that there is a renewal of Marxist sociological ideas because of revolutions in developing countries, as studied by political scientists, sociologists and even anthropologists. The forces at work and the changes that are taking place in peasant, tribal or caste societies belong more to the sphere of sociologists and anthropologists rather than to that of the political scientist. Moreover, the fields into which Michaels, Max Weber and Pareto led sociology by the end of the 19th century are still being pursued. A new feature of these studies is that they are comparative. It is becoming increasingly difficult to distinguish political science from political sociology. There are a number of Marxist studies having Marxist socialist ideas as their hypothesis. Also, as modern State is increasingly getting involved in providing welfare amenities, sociological slant to political activity and political thinking is gaining more and more of acceptance.