Classicly

This is, indeed, but the brief outline of a theory; and like all other theories, it requires great modification in its application to the world. Man in his progress to civilization is not always influenced by the same principles operating in the same way. In one instance, as he breaks through the spell of prejudice—grasps the sword of reason, and enters upon his rude analysis of mind and matter, he is directed by some apparently fortuitous agency, at once to the elements of peace and happiness, and advances in rapid strides from barbarism to refinement. In another instance, in the same rude contest—the same clashing of mental and physical energy, a nation falls exhausted in the struggle, and sinks, if possible, to a state even more hopeless than before. Nor is this period of revolutions confined to the incipient stage of science in all its branches.