In his most significant work, The Ideology of National Bolshevism, Agursky develops his own original concept of the purely national, original Russian character of the October Revolution, its inevitability and conditionality. He cites convincing facts of mass support for the Bolsheviks by their former rivals. Among them, the researcher lists the Social Revolutionaries, former tsarist generals, specialist engineers, Kolchak ministers, Black Hundreds, some churchmen and emigrants - this is the seemingly unexpected environment on which the leaders of Bolshevism could rely to some extent in their own interests. Among other such fellow travelers of the revolution, Agursky assigns the greatest importance to the Harbin emigrant, the head of the Change of Milestones movement, N.V. Ustryalov, who suggested the inevitability of transforming communism and internationalism into real national power with a true leader of the state at the head. In the concept of Agursky, Bolshevik leaders like Leon Trotsky or Anatoly Lunacharsky are representatives of "red patriotism," which are opposed by pure communist internationalists Lev Kamenev, Grigory Zinoviev. The internal party struggle of the "Bolsheviks" and "communists" was optimally used by I.V. Stalin, who thus realized Nikolai Ustryalov's dream of a true national Bolshevik leader.