Even if one had not this strictly rational principle to guide one, there is the whole of history to guide one. It is true that the pretence of common citizenship has worked now for a shorter, now for a longer, period, but never indefinitely. You always come at last to a smash. The Jew is welcomed in mediaeval Poland; he comes in vast numbers; all goes well. Then the inevitable happens and the Jew and the Pole stand apart as enemies, each accusing the other of injustice, the one crying out that he is persecuted, the other that the State is in danger by alien activity within. Spain alternatively pursued this policy, and its opposite; the whole history of Spain—the original seat of Jewish influence in Europe after the general exile—is a history of alternating attempts at the sentimental solution and a savage reaction against it: the reaction of the man, who, fighting for his life, strikes out violently in terror of death. That is the history not only of Spain but of every other country at one time or another.
Indeed, we have before our very eyes to-day the beginning of exactly such a reaction in the West of Europe and the United States of America, and it is the presence of that reaction which has caused this book to be written. The attempt at a Liberal solution has already