This document provides an overview of the origins and development of sociology. It discusses the early theorists who studied and defined sociology, including Auguste Comte who is considered the founder of modern sociology. It also covers key thinkers and ideas that shaped sociology such as Marx and the concept of class conflict, Durkheim and mechanical versus organic solidarity, and Weber's ideas of verstehen and rationalization. The document traces how sociology emerged in Europe and was influenced by industrialization and the desire to scientifically study changing social conditions.