The vogue of Marxism in Great Britain and France, which began on a modest scale after the success of the Bolshevik revolution in Russia, rapidly gath… - E. H. Carr

The dilemma of reconciling political equality with political liberty was always resolved, down to the time of J. S. Mill, by defining liberty as freedom to do everything that did not restrict the liberty of others. But when equality comes to mean economic equality―or at any rate some enforced mitigation of economic inequality―and when liberty comes to mean something like liberty of opportunity, or free and equal access to the good things which society has to offer, the relation between equality and liberty takes on a new and much more baffling complexion.

History is the long struggle of man, by the exercise of his reason, to understand his environment and to act upon it. But the modern period has broadened the struggle in a revolutionary way. Man now seeks to understand, and to act on, not only his environment, but himself; and this has added, so to speak, a new dimension to reason, and a new dimension to history. The present age is the most historically minded of all ages. Modern man is to an unprecedented degree self-conscious and therefore conscious of history. He peers eagerly back into the twilight out of which he has come in the hope that its faint beams will illuminate the obscurity into which he is going; and, conversely, his aspirations and anxieties about the path that lies ahead quicken his insight into what lies behind. Past, present and future are linked together in the endless chain of history.

The essential result of the French revolution was to establish the doctrine of popular sovereignty as the foundation of modern Europe, though with no more precise definition of that elusive category "the people" than that popular sovereignty was the antithesis of the personal authority of the monarch.