WHAT DOES LENIN MEAN WHEN HE SAYS THAT THE 1905 REVOLUTION WAS A DRESS REHEARSAL?
Lenin believed that a number of specific requirements (relating to his adaptations of Marx) needed to be fulfilled by the separate social classes and the Bolsheviks themselves.
The main reason why the 1905 revolution was deemed to be a dress rehearsal by Lenin was because there was no unity between the masses and the political parties and no unity within the political parties themselves.
Although the political parties shared the same ultimate goal of overthrowing the existing order of autocracy, they were divided from one another. The Liberals, the Mensheviks, the Bolsheviks and the Social Revolutionaries had different political programmes. In 1905 each political party made its own struggles against autocracy. Thus the autocratic government could suppress these political parties one by one. Besides the division between the political parties, there was disagreement within each of the political parties: the right-wing Liberals disagreed with the radical Liberals, the Mensheviks disagreed with the Bolsheviks, and the moderate Social Revolutionaries disagreed with the radical Social Revolutionaries. The internal division within each party immensely weakened the strength of its struggle against autocracy.