This volume, edited by P. Whitney Lackenbauer and Peggy Mason, publishes the proceedings from a series of virtual sessions co-organized by the Canadian Pugwash Group, the Rideau Institute, the North American and Arctic Defence and Security Network (NAADSN), and Trent University in February 2021. Visit NAADSN at the following link for the contribution by Ernie Regehr, O.C., The Simons Foundation's Senior Fellow in Arctic Security and Defence, and to view the entire publication.