We are all descended from Viking raiders, Ghengis Khan, the Genocidal Yamnaya, or a Medieval Robber Baron, and Slave masters............its just that most people don't even know it.
Normal Lords did Chivalry on the battlefield, riding their horses into the fray. However they did another type of riding in the villages.....not so chivalrous and less heroic. Less well documented in the annals of the Bayeux Tapestry, but recorded in the DNA of many of us.
Like in the David Attenborough programmes, most male ancestors had some kind of dominance or Power in their World. Most female ancestors simply existed & reproduced. Lots of Kings and only a few Queens, or no Queens at all. From Bull Elephant Seals to the Houses of Parliament.
Julius Caesar was the exception to the rule. He conquered Europe and left it all to a distant nephew.
"There
is no slave who does not descend from a king, there is no king who does not descend from a slave" - Plato