Title: What is a historical bias? - Quora
Headings: 
What is a historical bias?
Content: Of course they’re going to be portrayed harshly. **I’m assuming by history, you meant “the study of the past”. If you meant “the past itself”, then no. Whatever happened in the past happened. It’s how our interpretations of the past that are biased. But I doubt you’re asking if the past itself is biased. Related Answer
Lief H Carter
, works at U of Georgia, Brown, Colorado College
Answered 2 years ago · Author has 3.5K answers and 664.2K answer views
Can we avoid bias in history? This question is unanswerable unless/until we agree on what we mean by both “bias” and “history.” The words mean different things depending on the context. For example, if “bias” means “factually incomplete,” then we will always have bias because reality and truth are themselves only social constructs, things we invent to cope with the infinite complexity and flux of the universe by simplifying it.