For the continuing worldwide oppression of class, nation and race, the incalculable waste and untold misery, the unending destruction and preparation for destruction and the permanent threat to democratic order that characterize the rule of capitalism in this, its most technically advanced, most "enlightened" and most materially wealthy era now threaten human survival itself. In the age of atomic weapons and intercontinental missiles, the predatory system of imperialist rivalry and global exploitation, of military intervention and counterrevolutionary war, faces mankind with the prospect of the ultimate barbarism.

from the 1969 book Empire and Revolution.