This document provides an overview of sociology as a discipline. It defines sociology as the scientific study of human behavior and society. It discusses the key thinkers who developed sociology, such as Comte, Durkheim, Marx, and Weber. It also summarizes the main theoretical perspectives in sociology - functionalism, conflict theory, and symbolic interactionism - and how they explain concepts like the relationship between individual and society, the basis of social order, and the source of social change.