The publication of the sixth edition of Classical Sociological Theory is characterized by both continuity and change. The book continues to do what it has always done—offer a comprehensive overview of classical sociological theory in a single volume. As in previous editions, the in-depth discussion of theories (often enlivened with examples) in the text narrative is accompanied by informative and engaging biographical sketches of many of the most important thinkers in the history of sociology. Classical Sociological Theory continues to include two historical chapters covering the early history of the field (Chapter 1) as well as its most recent developments (Chapter 2). These chapters give students an overview that allows them to put the work of each theorist in its historical, social, and political context. In one convenient volume, this book offers students a handy overview of most of what they need to know about classical sociological theory. The social world is a complex and difficult subject; so are many of the theories about it. I have striven to make theory interesting, relevant, and as clear and accessible as possible.