Man is an historical animal, with a deep sense of his own past; and if he cannot integrate the past by a history explicit and true, he will integrate it by a history implicit and false.
The only difference between the narrator of contemporary affairs and the ordinary historian is that moral judgments about the present provoke fiercer reactions and have more immediately practical implications than moral judgments about the past.
Anyone who is going to make anything out of history will, sooner or later, have to do most of the work himself. He will have to read, and consider, and reconsider, and then read some more.