Every historian loves the past or should do. If not, he has mistaken his vocation; but it is a short step from loving the past to regretting that it has ever changed. Conservatism is our greatest trade-risk; and we run psychoanalysts close in the belief that the only "normal" people are those who cause no trouble either to themselves or anybody else.
We are apt to say that a foreign policy is successful only when the country, or at any rate the governing class, is united behind it. In reality, every line of policy is repudiated by a section, often by an influential section, of the country concerned. A foreign minister who waited until everyone agreed with him would have no foreign policy at all.
Conformity may give you a quiet life; it may even bring you to a University Chair. But all change in history, all advance, comes from the nonconformists. If there had been no trouble-makers, no Dissenters, we should still be living in caves.
In 1917 European history, in the old sense, came to an end. World history began. It was the year of Lenin and Woodrow Wilson, both of whom repudiated the traditional standards of political behaviour. Both preached Utopia, Heaven on Earth. It was the moment of birth for our contemporary world.
In my opinion we learn nothing from history except the infinite variety of men's behaviour. We study it, as we listen to music or read poetry, for pleasure, not for instruction.