General Discussion
In reply to the discussion: Should plural marriage (more than one partner) be legalized? [View all]Sweeney
(505 posts)If every tenth man in a limited set society could have ten wives and each had children, any gen defect that man might carry will become more common in the population. And we all have defects.
If you are talking about actual inbreeding, we are already inbred. Humanity has grown from very small and tight communities where even against taboo, closely related people were married. We have been able to keep that from being a problem with the incest taboo. This is a universal law because when people would forget it, they would soon find the error in their behavior, so they thought such behavior cursed. Every father daughter consanguineous relationship has a fifty percent chance of producing an anomaly. Those are stiff odds to over come. Why would anyone try?