The conflict between Mohammed and Marx has received a fair amount of scholarly attention; so have the occasional attempts at syncretism, fusing the two visions. The confrontation of Buddha and Marx is just as interesting, and has been explored rather less. There are certain parallels between Buddhism and Islam. Both contain a High Tradition of great, scholarly sophistication which lends itself to purification, and can constitute the banner of political and spiritual ‘Reform’ and revival. This has in fact happened within both Islam and Buddhism. But within the two most thoroughly Buddhism‐dominated societies, Mongolia and Tibet, the process was not allowed to run its course. Each of these countries has a small population, and in each case what might have been the natural internal development was distorted by the overwhelming might of a great communist power. In neither case, however, has the victory of Marx over Buddha been complete or uncontested. The crucial events did not happen simultaneously in the two countries, but happened about three decades later in Tibet than they had in Mongolia. The present article contains insights into and information about the last years of the ancien régime in Tibet, based on unique understanding and research opportunities.