It's not particularly harmful in terms of heredity (roughly the same "danger" as a woman having a kid at 40 in societies where it is not common). Interesting f

It's not particularly harmful in terms of heredity (roughly the same "danger" as a woman having a kid at 40 in societies where it is not common). Interesting factoid: Freud was married to his first cousin. It's partly because of misunderstood heredity dangers, but mostly because of increased social pools. (Cousins used to be very socialized with each other, but strangers of opposite sex had minimal opportunities for meaningful interactions.)