This note provides a very brief introduction to some of the sociological terms and concepts used in discussions on the socio-political environment. It is primarily meant for the use of the students of the course Socio-cultural Environment of Business, offered at the Indian Institute of Management, Ahmedabad. However, it can be used as an introduction to any course that deals with the social, cultural or political environment of business. The terms discussed include stratification, identity, agency and structure. The note also includes a brief discussion of a simple model of political society.