Abstract This chapter summarizes the central arguments and findings of the book: popular nationalism does not inevitably lead to interstate war, and it can facilitate the maintenance of the status quo. After briefly reviewing the arguments and findings from each chapter, this chapter discusses some remaining questions. It also draws several implications for the international relations scholarship and highlights avenues for future research. In addition, based on the findings, this chapter offers a number of critical policy implications to prevent wars that stem from popular nationalism. Finally, it also provides extended implications about Chinese popular nationalism and the likelihood of war in the Asia-Pacific region.