 Here, he predicted that Russia's liberal bourgeoisie would be sated by a transition to constitutional monarchy and thus betray the revolution; instead he argued that the proletariat would have to build an alliance with the peasantry to overthrow the Tsarist regime and establish the "provisional revolutionary democratic dictatorship of the proletariat and the peasantry".In response to the revolution of 1905—which had failed to overthrow the government—Tsar Nicholas II accepted a series of liberal reforms in his October Manifesto.In this climate, Lenin felt it safe to return to St. Petersburg.