帝国主義論
Influenced by the events of the First World War, Lenin wrote the book "Imperialism, the Highest Stage of Capitalism". He argued that imperialism was a product of monopoly capitalism, as capitalists sought to increase their profits by extending into new territories where wages were lower and raw materials cheaper. He also criticised Kautsky's view that the imperialist powers would unite to form a peaceful, "ultra-imperialism", denouncing this view as "ultra-nonsense". Instead, Lenin believed that competition and conflict would increase and that war between the imperialist powers would continue until they were overthrown by proletarian revolution and socialism was established. Initial attempts to publish the work were stalled, and it would not see publication until September 1917.