‘Of course, Karl Marx and Friedrich Engels in The Communist Manifesto did not cause the revolutions in Europe; but they gave them their voice. It was the voice of insurrection. A spate of disaffection ran through Europe against the Bourbons, the Habsburgs, and governments everywhere. Paris was in turmoil in February of 1848, and Vienna and Berlin followed.’
Jacob Bronowski: The Ascent of Man, BBC, (1973), Page 379