With these elements - liberty, organization from the simple to the complex, production and exchange by the Trades (guilds), foreign trade handled by the whole city and not by individuals, and the purchase of provisions by the city for resale to the citizens at cost price - with such elements, the towns of the Middle Ages for the first two centuries of their free existences became centers of well-being for all the inhabitants, centers of wealth and culture, such as we have not seen since. One has but to consult the documents which made it possible to compare the rates at which work was remunerated and the cost of provisions - Rogers has done this for England and a great number of German writers for Germany - to learn that the labor of an artisan and even of a simple day-laborer was paid at a rate not attained in our time, not even by the elite among workers. The account books of colleges of the University of Oxford (which cover seven centuries beginning at the twel...