Although the North Atlantic was plunged into crisis in the early 1970s, radicals proved unable to seize the opportunity as they entered a crisis of their own. In France, to a degree unparalleled elsewhere, prominent former radicals not only disavowed anti-imperialist internationalism but rallied behind the rival human rights internationalism. In so doing, they brought with them a set of experiences, which strengthened human rights activism. Despite their fading fortunes, and the growing strength of their rivals, radicals struggled to reinvent anti-imperialist internationalism. But they found themselves trapped in an uphill battle facing one obstacle after another. One of the most devastating blows was the internecine war between China, Vietnam, and Cambodia. Revolutionaries in all three countries had developed a revolutionary strategy based in Leninism, joined hands in the struggle against imperialism, and claimed they were transitioning to communism together. Now they slaughtered each other in the name of national self-determination. Although the Third Indochina War did not destroy radicalism, it severely destabilized radical politics. While much of this failure can be traced to deeper histories of colonialism, imperialism, and American intervention in the region, revolutionaries, and the ideas that guided them, played a role as well. In this context, the idea of the right of nations to self-determination specifically, and the Leninist problematic more generally, suffered a terrible blow. The horrific events in Southeast Asia deepened the gnawing crisis of Leninism, which would ultimately bring down the project of anti-imperialist internationalism as such, creating a perfect opportunity for the rival human rights internationalism to take the stage.
