"The chaotic conditions of 1932 and 1933, when collectivization was at its height, generated the worst famine of the century. In the grain-rich regions of the Ukraine, the northern Caucasus and Kazakhstan, peasant resistance brought on the full fury of the Party. The farmers' own food was seized, even the seed for the following year's planting. Stalin ordered the security police to seal off the whole of the Ukraine from the rest of the Soviet Union to prevent anyone from leaving or food from getting in. It was almost certainly Stalin's single most murderous act. The most recent Russian estimates indicate a death toll of 4.2 million in the Ukraine alone in 1933. Whole villages starved to death or were dispatched by epidemics to which there was scant bodily resistance. In Kazakhstan the mainly nomadic farmers were forced into crude camps and left to die. An estimated 1.7 million, almost half the population of the republic, perished in the most wretched conditions. Thousands fled across the Soviet border to escape the death camps. In total an estimated 7 million fell victim to the class war launched in the countryside. Stalin told a critic in 1933 that it was the fault of the peasantry, for waging "silent war" against the Soviet state."