"The entire history of the international workers' movement in the twentieth century has furnished us with a wealth of material to show the way in which the working class and its organisations develop. From the study of the workers' movement over several decades, I drew the following inescapable conclusion: that when the mass of the workers enter the arena of struggle to change society, they inevitably gravitate, in the first instance, to the traditional mass organisations. The mass of the workers--and even the greater part of the advanced elements of the class--do not learn from books, but only from experience, and particularly the experience of great events. Where a strong and educated Marxist tendency is present, the process can be considerably shortened. This was the case with the Bolshevik Party in 1917."