This conclusion both briefly revisits the causal arguments that make up the book’s general(izable) framework and highlights the role of idiosyncrasy, contingency, and agency in the divergent normative trajectories of regional societies of Latin America, Africa, and Southeast Asia. It then considers the applicability of the book’s theory to a new case – the “Arab” region (defined by membership in the League of Arab States).The last section of the chapter discusses the status of sovereignty in the South today; challenges for intrusive regionalism moving forward; and the normative implications of non-interference and its institutionalized violations.