Title: What is a historical bias? - Quora
Headings: 
What is a historical bias?
Content: If the “loser” has a more effective method of recording events, then we’re more likely to hear the loser’s side of the story. That’s why the Vikings are traditionally described as bloodthirsty heathens: they raided the exact people who typically recorded historical events.* When you think of the “victors” throughout history who are traditionally portrayed as savages or barbarians, there’s a chance that the people they defeated had a writing system while the “victor” did not. With that—and, well, a whole host of other factors—in consideration, the notion that history is written by the victors simply isn’t true. Assuming so can be very dangerous, but that’s an answer for another question. With that out of the way, let’s answer your question. “ Since history is written by the victors, doesn’t this mean that history is intrinsically biased? ” No, because, as I’ve argued, history is not solely written by the victors. The results of a conflict does not automatically determine who gets to write about it.