It is out of the question to think that the French Revolution could have been carried into effect by philosophizing theories if they had not found an army of agitators led by demagogues of the grand style. These demagogues inflamed popular passion that had been already aroused, until that volcanic eruption finally broke out and convulsed the whole of Europe. And the same happened in the case of the gigantic Bolshevik revolution which recently took place in Russia. It was not due to the writers on Lenin's side but to the oratorical activities of those who preached the doctrine of hatred and that of the innumerable small and great orators who took part in the agitation.