Dockworkers have power. Often missed in commentary on today’s globalizing economy, workers in the world’s ports can harness their role, at a strategic choke point, to promote their labor rights and social justice causes. Peter Cole brings such overlooked experiences to light in an eye-opening comparative study of Durban, South Africa, and the San Francisco Bay Area, California. Path breaking research reveals how unions affected lasting change in some of the most far-reaching struggles of modern times.First, dockworkers in each city drew on longstanding radical traditions to promote racial equality. Second, they persevered when a new technology—container ships—sent a shockwave of layoffs through the industry. Finally, their commitment to black internationalism and leftist politics sparked transnational work stoppages to protest apartheid and authoritarianism.