I propose that the establishment of walled communities , restrictions on tribal migrations , heirarchical social structures , replacement of experience based shamanistic rites with belief and status based priestly regurgitations , exponential explosion of population centers compared to the relatively limited size of migratory tribes , and a thousand other details of the rise of the age of sedentiary agricultural communities spell the beginning of a thousand perversions . Consider the anti social changes that can be provoked in laboratory rats and even dogs when the rule system imposed conflicts with a more organic expression of their evolutionary path . Speaking of Hammurabi , what would it be like to live without a set of written rules , and under what circumstances would written rules tend to become valuable to bother with . Formalized institutional structures . Artificial personhood . The invention of god .