One of the fundamental reasons for this critical role of leadership or the subjective factor in our epoch, stems from the fact that all the major objective conditions for the overthrow of capitalism are rotten ripe (the integration of the world economy, the inability of capitalism to take society forward, the chronic instability and impasse of the system, the elements of barbarism emerging, the existence of mass unemployment, etc). The defeat of the numerous revolutions since the October Revolution of 1917 has been due to the failure of leadership of the mass organisations, whether they are social democratic or Stalinist. For the successful socialist revolution, a mass party is needed with a far-sighted revolutionary leadership schooled in the ideas of Marxism (“the memory of the working class”). The Bolsheviks under the Leadership of Lenin and Trotsky was able to provide this. They provided the dialectical unity of the objective and subjective factors.