Historical Perspective and Gullibility

I don't think Tompkins brings anything new to the table with her opinions on the bias in history concerning Native Americans. Yes, the European settlers have a long history of screwing over this country's original inhabitants, and yes, there will always be a huge question mark about the accuracy of "first-hand" accounts. Unfortunately this raises concern for me over the accuracy about other parts of history. How can we know if what is written in our text books what actually occurred? How do we know if our sources are accurate? We don't. So we'll continue to blindly believe just about everything we read and history will probably be doomed to repeat itself regardless.