It may seem to be a matter of indifference whether we understand the meaning of historical events this way or that; yet there is the same difference between a man who says that the people of the West moved on the East because Napoleon wished it and a man who says that this happened because it had to happen, as there is between those who declared that the earth was stationary and that the planets moved round it and those who admitted that they did not know what upheld the earth, but knew there were laws directing its movement and that of the other planets. There is, and can be, no cause of an historical event except the one cause of all causes. But there are laws directing events, and some of these laws are known to us while we are conscious of others we cannot comprehend. The discovery of these laws is only possible when we have quite abandoned the attempt to find the cause in the will of some one man, just as the discovery of the laws of the motion of the planets was possible only when men abandoned the conception of the fixity of the earth.