>>33116>one of the few universal taboosYear old post but worth noting that historically it cannot be considered universal. Egypt around 1st-3rd century AD featured 15%-20% marriages in the general population (not just elite) being brother-sister marriages, most of them between full siblings. This was in a social context where women's independence was very high for the time, too: property was split equally between sons and daughters, women held property to their own name, and they could divorce husbands at will. Ancient Iran also saw sibling incest as holy and their religion encouraged it until Islam took over.
At present, it is looked down everywhere to a greater or lesser extent. Only difference is whether the law punishes it or not. But it's not an ironclad rule of nature, as the past shows.
