The incontestable proof of this deduction is that, however many commands were issued, the event does not take place unless there are other causes for it, but as soon as an event occursbe it what it maythen out of all the continually expressed wishes of different people some will always be found which by their meaning and their time of utterance are related as commands to the events. The movement of nations is caused not by power, nor by intellectual activity, nor even by a combination of the two as historians have supposed, but by the activity of all the people who participate in the events, and who always combine in such a way that those taking the largest direct share in the event take on themselves the least responsibility and vice versa. But as the moral activity is inconceivable without the physical, the cause of the event is neither in the one nor in the other but in the union of the two. Or in other words, the conception of a cause is inapplicable to the phenomena we are examining. In the last analysis we reach the circle of infinitythat final limit to which in every domain of thought man's reason arrives if it is not playing with the subject.
Electricity produces heat, heat produces electricity.
Atoms attract each other and atoms repel one another. Speaking of the interaction of heat and electricity and of atoms, we cannot say why this occurs, and we say that it is so because it is inconceivable otherwise, because it must be so and that it is a law. The same applies to historical events. Why war and revolution occur we do not know. We only know that to produce the one or the other action, people combine in a certain formation in which they all take part, and we say that this is so because it is unthinkable otherwise, or in other words that it is a law.