The criteria by which a politician should be judged are, firstly, the positive virtues he possesses, and, secondly, the actual services he has rendered to his country.
In politics facts alone are of value, and any juggling with possible hypotheses is quite futile. It is, for example, perfectly true, but of no importance, to say that had the Romans been defeated by the Huns on the Gatalaunian Fields the growth of western culture would have been impossible and the civilisation of the time would have been destroyed—as indeed our own civilisation to-day will be destroyed if the Soviets are victorious in this war.