 Evidence of secret deals between the Tsar and British and French governments to split the spoils of war was released by the Soviets in 1917–18.In the 1920s and 1930s, more socialist works built on this theme, a line of analysis which is still to be found, although vigorously disputed on the grounds that wars occurred before the capitalist era.Lenin argued that the private ownership of the means of production, in the hands of a limited number of capitalist monopolies, would inevitably lead to war.