It's weird how human behavior mirrors scientific basis without pre-existing knowledge. It seems Roman Law required, exactly, 4 degrees of familial separation.

It's weird how human behavior mirrors scientific basis without pre-existing knowledge. It seems Roman Law required, exactly, 4 degrees of familial separation. "Roman civil law prohibited marriages within four degrees of consanguinity[44] but had no degrees of affinity with regards to marriage." https://en.wikipedia.org/wiki/Incest#Antiquity https://en.wikipedia.org/wiki/Incest#Antiquity (Top of third to last paragraph in section)