n interesting study could be made of the fertilizing effect of error in the intellectual world. What a revolution has been caused in historical studies by the enormous errors of those misguided but prolific Germans, Karl Marx, Max Weber, Werner Sombart The importance of these men is that they obliged scholars to ask new questions: the fact that their own answers were erroneous is a secondary matter. Immediate falsities were soon exposed; ultimately a whole new science was born and more scrupulous thinkers gave exacter answers. Indirectly the new science and the exacter answers owe their...