Written by Dee Brown in 1970, Bury My Heart At Wounded Knee is the story of the American West's conquest by European settlers told from the perspective of the Native Americans.
In 1974 an administrator in Wild Rose, Wisconsin, who had never read the book (they heard a review on the radio) decided to ban it saying it was "slanted". An English teacher argued that it wasn't. The administrator replied "If there's a possibility that something might be controversial, then why not ban it?"
There have been further complaints about Bury My Heart At Wounded Knee being "biased", which I find troubling. We are taught to idolize the "Indian fighters" who slaughtered millions, we are taught to see treaty breakers and marauders as heroes, but when the story is told from the Native American perspective, we call it "slanted", "biased" and keep students from seeing it.
The trouble with complaints about "bias" is that people present them as if truth is relative. Yes, there are two sides to every story: but that doesn't mean that both sides are true.