If the Windsor Jazz Riot has long been lost from our collective historical memory, it provides an important moment to think about current national debates over riots, race relations, and national boundaries. Borders—be they national, geographical, social, or cultural—provide us the opportunity to blame outsiders for social ills, and for expressing collective fears. We tend to associate this most often with the U.S.--Mexico border, where inflammatory language about anchor babies, Mexican rapists, and drug smugglers dominates public debates. But there is a deep history of racial division along the U.S.--Canada divide, one that needs to...