The theory of the transference of the will of the people to historic persons is merely a paraphrase—a restatement of the question in other words.
What causes historical events? Power. What is power? Power is the collective will of the people transferred to one person. Under what condition is the will of the people delegated to one person? On condition that that person expresses the will of the whole people. That is, power is power: in other words, power is a word the meaning of which we do not understand.