“Vickery points out that the Kissinger-Nixon policy during the last two years of the war was a “major mystery,” for which he suggests an explanation that appears to us quite plausible. Referring to the “Sonnenfeldt Doctrine,” which holds that “pluralistic and libertarian Communist regimes will breed leftist ferment in the West,” he suggests that “when it became clear [to U. S. leaders] that they could not win in Cambodia, they preferred to do everything possible to ensure that the post-war revolutionary government be extremely brutal, doctrinaire, and frightening to its neighbors, rather than a moderate socialism to which the Thai, for example, might look with envy.” In short, though it was understood that the United States had lost the war in Cambodia (even though it was, quite clearly, still trying to win it in Vietnam), the destruction of rural Cambodia, by imposing the harshest possible conditions on the eventual victors, would serve two classic ends: retarding social and economic progress, and maximizing the brutality of the eventual victors. Then the aggressors would at least be able to reap a propaganda victory from the misery they had sown.”

Source: After the Cataclysm: Postwar Indochina and the Reconstruction of Imperial Ideology, with Noam Chomsky, 1979, pp. 218-219