There were experiences in previous centuries which might well have challenged this unqualified optimism. But the expansion of man's power over nature… - Reinhold Niebuhr

" "

There were experiences in previous centuries which might well have challenged this unqualified optimism. But the expansion of man's power over nature proceeded at such a pace that all doubts were quieted, allowing the nineteenth century to become the “century of hope” and to express the modern mood in its most extravagant terms. History, refusing to move by the calendar, actually permitted the nineteenth century to indulge its illusions into the twentieth. Then came the deluge. Since 1914 one tragic experience has followed another, as if history had been designed to refute the vain delusions of modern man.