This introductory chapter provides an overview of this study of market power politics. Two main puzzles drive this research. First, why do some states continue to pursue policies of territorial expansion in the face of widely accepted norms of territorial integrity and increased interconnectedness in the global economy? Second, why do these states sometimes turn to strategic delay and gray zone tactics, rather than war or institutional settlements, to achieve their expansionist goals? To answer these puzzles, the chapter introduces a theory of market power politics. According to this theory, the desire to gain market power motivates states to expand their territorial reach, while the presence of economic interdependence and international instructions can constrain states from taking aggressive steps in pursuit of these goals. After discussing some contributions of the research project, the chapter concludes with an outline of the book.