This Afterword underscores the collective interdisciplinarity of Canada-US Border Studies as evidenced in the preceding essays, particularly as they decidedly transcend the borders of individual disciplines. In the process, the essay maps out how the empirical and theoretical richness of such collective interdisciplinarity in the study of the US-Canada border effectively captures and documents the social heterogeneity characterizing the cultural, economic, political, environmental, and historical borderlands found at the transnational crossroads of the US-Canada and Canada-US international boundaries. The theoretical and empirical analysis of this productive interdisciplinarity in the field of border studies more broadly is presented from the theoretical perspective of border theory as it emerged via the US-Mexico border and through a brief photo essay of the Freedom Convoy of 2022.