Fustel marshalls historical evidence to show that in the classical city-state social organisation based on religion -- for example, the patrician order, family graves, the sacred fire, the god Terminus who demarcated property, shared ceremonial meals, etc. -- came before social organisation based on law. The Ancient City should be read as a corrective to the excessively rationalist bias in constitutional thinking which we inherit from the 18th century. Sadly, this important and rewarding book did not appear until one hundred years after the US Constitution was adopted.