The phenomenologists were concerned to show that essential structures of being, knowable by rational insight, are found far more abundantly than is commonly thought. In his great monograph Reinach shows that in the civil law, where one usually thinks that there are only legal structures of human devising, there are in fact many essential structures, such as the structure of promising or of owning. These pre-positive structures, which are something different from the moral norms relevant to the positive law, provide the civil law with a foundation that can be known by philosophical insight....