Sociology is the systematic study of human society and social behavior. It examines how societies are structured and how social relationships influence individual behavior. There are three main theoretical perspectives in sociology: functionalism, conflict theory, and symbolic interactionism. Functionalism views society as a system whose parts work together to promote stability. Conflict theory emphasizes social change and power struggles between groups. Symbolic interactionism focuses on how people interact and influence each other on a small scale through symbols and their own interpretations. Sociologists use multiple perspectives to gain a well-rounded understanding of social issues and human behavior.