The French author, Joseph Robert Pothier, had an enormous influence on the common law of contract. The whole structure of the Common Law of contracts and sales is based largely on Pothier's treatises on obligations and sales. The wisdom he passed on had its origins in ancient Rome but was reshaped by Aristotelian thinking in the Middle Ages, the Renaissance, as well as the humanism of the Enlightenment. It is well known that and that he was the o inventor of the rule in Hadley v. Baxendale. It is less well known that his influence on the common law of contracts was far more wide ranging.