Once Joseph Stalin took the lead of the Soviet Bolshevists after the death of Vladimir Lenin, he quickly turned away from Lenin's New Economic Policy, with its many concessions to capitalism, to a policy of one-country socialism, driven by his first Five Year Plan (1928) and a plan that other Bolsheviks like Lenin and Trotsky thought impossible. That shift, radical, forced Stalin to "urbanize" the USSR's vast rural areas-that is, to impose a factory-like...