A collection of letters by Lenin, originally published in 1917, in which he outlines the principal arguments which were especially essential for the "practical tasks" of the working-class movement. These letters came about after a series of meetings between Bolshevik and Menshevik delegations at various consulates and conferences led to an open split between the two groups; who concluded that they must "openly"discuss their differences - particularly on the unification of the Russian Social Democratic Social Party. Lenin’s letters in this volume were a response to this call, and carried heavy weight in the central committee meeting of the party in Petrograd, April of 1917.