A subject in the history of business that is waiting to be studied is the development of ideas on how business should be conducted and, secondary to that, how business men should be trained. Training in tool subjects—writing, bookkeeping, etc.—is almost as old as business, and commercial geography and law have long been considered proper subjects for the aspiring young merchant's clerk to study. As for the science of business, that field has been left almost entirely to the economic theorist, with the result that it has not in reality been a “science of business” at all.