This document provides an introduction to sociology and its importance and applications to nursing. It defines sociology and discusses how sociology is important for nurses to understand human behavior and interactions. It also summarizes the key contributions and theories of influential sociologists, including Auguste Comte, Herbert Spencer, Karl Marx, Emile Durkheim, and Max Weber. Finally, it defines medical sociology as the sociological analysis of health organizations and practices, and explores the differences between sociology in medicine, which applies sociological perspectives to medical questions, and sociology of medicine, which examines the medical field from a sociological viewpoint.