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.
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.
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.