One hundred years ago this coming Aug. 4, the day Britain declared war on Germany, socialists in the German Reichstag voted for credits to finance the war. Marxists — including Lenin, who that day was in what now is Poland — were scandalized.

Marx had preached that the proletariat has no fatherland, only a transnational class loyalty to proletarians everywhere. "In 1918," wrote Louis Fischer, Lenin's best biographer, "patriotism and nationalism, born of the 'subjectivism' Lenin so disliked, were ideological crimes in Soviet Russia."

These are history-shaping virtues in Ukraine today. Because the nation-state is the necessary framework for durable political liberty, nationalism is a necessary, although insufficient, impulse sustaining liberty. Marx, whose prophesies were perversely predictive because they were almost invariably wrong, predicted the end of nationalism. Economic forces, he said, determine political, cultural and psychological realities. So capitalism, with its borders-leaping cosmopolitanism, would dilute to the point of disappearance all emotional attachments to nations. Ukraine's ferment is an emphatic, albeit redundant, refutation of Marxism.