" That the revolution will embrace Europe we do not doubt. If one of the four great continental capitals - Paris, Vienna, Brussels or Berlin - rises in revolution and overturns its government, it is almost certain that the three others will follow its example within a few weeks' time. It is, moreover, highly probable that the Peninsulas and even London and St Petersburg would not be long in following suit. But whether the revolution would everywhere exhibit the same characteristics is highly doubtful. "

― Pyotr Kropotkin , The Conquest of Bread and Other Writings