"Then, after the destruction of the Roman Empire and the French Revolution, began the third great crisis of western civilization. The fundamental reason was the same for all three: in the case of Rome, the downfall of the imperial government; in that of the Revolution, the downfall of the French monarchy; and today, the downfall of the monarchic system in Europe during 1918 and 1919. The war which began on September 1, 1939, was not born of a conflict of political interests between the great powers, as was the first World War; it was born, like all the wars of the French Revolution, of the intellectual, moral, and political disorder to which Europe after 1919 was subjected by the collapse of the monarchic system, by the universal cult of revolution, and by the phrenetic subversion of all the laws."
January 1, 1970
https://en.wikiquote.org/wiki/French_Revolution