"'Socialism in one country' was Stalin's solution to the problem that had repeatedly divided the leadership of the Bolshevik Party since Lenin's death in 1924. How could the revolutionary regime achieve the industrialization of Russia's backward rural economy without the resources of the more developed West? Trotsky had seen world revolution as the only answer. When that failed to materialize, other Bolshevik leaders, notably Nikolai Bukharin, were inclined to conclude that rapid industrialization was no longer an option. The pace would have to be slow. Stalin, ruthlessly positioning himself to be Lenin's successor - suppressing Lenin's deathbed warning against him - rode roughshod over these rarefied debates. Rapid industrialization, he insisted, was possible within the borders of the Soviet Union. All that was needed was a plan, and the iron willpower that had won the civil war. What Stalin meant by 'socialism in one country' was a new revolution - an economic revolution that he, the self-styled 'man of steel', would lead. Under the first Five-Year Plan, Soviet output was to be increased by a fifth. Managers were encouraged to 'over-fulfil their quotas'; workers were exhorted to work superhumanly long shifts in imitation of the heroic miner and shock worker (udarnik) Aleksei Stakhanov."