Big fat Doh. Beowulf wasn't written by Dan Rather. There were and continue to be "interactions" between humans of varying development. You aren't going to convince me a Maury Aboriginal is the same strain of human as an a Dutchman for example.
Beowulf and his clan wiped out a good number of these bloodlusting, queen mother obeying brutes.
Homo sapiens are Homo sapiens, whether they are Maori Aboriginals or Dutchmen. The differences that you see are largely a matter of geographical adaptation, not descent.