There are three good reasons at the present time to try to arrive at an historical model to explain the development of anti-Jewish stereotyping and prejudice, and in this way, provided it is worked out at a sufficiently high level of abstraction, at an historical model of racism.
The first reason is that both the Netherlands and its neighbours are increasingly faced with racism and that for a good line of action it is necessary to collect all kinds of knowledge. Moreover, it is desirable that historians prove willing to co-operate by making their particular contribution to this collection of knowledge. The second reason is that in contemporary thinking about history a tendency seems to have made itself felt that considers the narrative element of history as the only true activity of the historian, so that a hypothetical-deductive, one might say Popperian, approach to the past seems to be wrong. Although I do not want to enter into a methodological discussion, which I am glad to leave to my friend P. H. H. Vries, who has very capably formulated a point of view that I subscribe to, my intention is to show the usefulness of an abstract, partially mathematical, model in this article. By the way, in the framework of an article it is impossible to present an extensive test of the predictions of the model by means of source material. It can only be hinted at. This article is not non-narrative because I want it to be non-narrative, but because of lack of space. A full exposition would need a book. I shall only present in summary what I hope is the logical argument that lies at the basis of the model.