Only one force can arise today to challenge the continuing decay and increasing barbarism of all regimes based upon exploitation: that of the producing class, the socialist proletariat. Constantly increasing in numbers through the industrialization of the world economy, ever more concentrated in the process of production, trained through misery and oppression to revolt against the ruling classes having had the chance to experience the results of its own "leadership," the working class, despite an increasing number of difficulties and obstacles, has ripened for revolution. The obstacles confronting it are not insurmountable. The whole history of the past century is there to prove that the proletariat represents, for the first time in human history, not only a class in revolt against exploitation but a class positively capable of overthrowing the exploiters and of organizing a free an d humane society. Its victory, and the fate of humanity, are in its hands.