" In Christianity this evolution lasted centuries; in Bolshevism — only decades. If Lenin was the St. Paul of Marxism, who set out to transplant the movement from its original environment into new lands, Stalin was already its Constantine the Great. He was, to be sure, not the first Emperor to embrace Marxism, but the first Marxist revolutionary to become the autocratic ruler of a vast empire. "

― Isaac Deutscher , Russia After Stalin