Prehistoric humans are likely to have formed mating networks to avoid inbreeding. Early humans seem to have recognized the dangers of inbreeding at least 34,000 years ago, and developed surprisingly sophisticated social and mating networks to avoid it, new research has found. Source 3s.
This is not anything really new except to figure it out. Scientist have often surmised that our ancestors have ranged to find or capture different females of the species to breed better and to make the human race more adoptive and able to over come hardships and threats. Our genetic make up has proven this. I find it interesting however on how they figured this all out.