For the formation of a social history of the Jews within nineteenth-century European society, it was, however, decisive that to a certain extent every Jew in every generation had somehow at some time to decide whether he would remain a pariah and stay out of society altogether, or become a parvenu, or conform to society on the demoralizing condition that he not so much hide his origin as ‘betray with the secret of his origin the secret of his people as
