This paper adds to a vital international tradition of discussing the history of sociological theory by empirically investigating its structure, dynamics, and relationships. Our primary contribution to this tradition is to bring to the conversation a greater level of comparative and historical scope, a more systematic quantitative methodology, and a degree of reflexivity and synthesis. To do so, we examine some 670 editions of sociological-theory books geared toward students, published in English, German, and French between 1950 and 2020. Our empirical analysis highlights patterns, trends, and relationships among the theorists featured in these books, the narratives and approaches that define their visions of sociological theory, and the characteristics of the authors who wrote them. Our findings reveal some key intellectual as well as sociological factors associated with the changing composition of the canon.