to repeat...

All great movements, every vigorous impulse that a community may feel, become perverted and distorted as time passes, and the atmosphere of the earth seems fatal to the noble aspirations of its peoples. A wide humanitarian sympathy in a nation easily degenerates into hysteria. A military spirit tends towards brutality. Liberty leads to licence, restraint to tyranny. The pride of race is distended to blustering arrogance. The fear of God produces bigotry and superstition. There appears no exception to the mournful rule, and the best efforts of men, however glorious their early results, have dismal endings, like plants which shoot and bud and put forth beautiful flowers, and then grow rank and coarse and are withered by the winter. It is only when we reflect that the decay gives birth to fresh life, and that new enthusiasms spring up to take the places of those that die, as the acorn is nourished by the dead leaves of the oak, the hope strengthens that the rise and fall of men and their movements are only the changing foliage of the ever-growing tree of life, while underneath a greater evolution goes on continually.
-Winston Churchill, "The River War"