Actually, you're right, but you're making the opposite point than you think you are. I wasn't alive in 50's or the 60's (and I was too young to even remember the 70's), so my whole life I just took for granted that what the history books had to say about racial inequalities at those times was true. It's hard to miss, though, that people are saying the exact same things today when I can look around and observe that they aren't true and haven't been at any point in my lifetime. It doesn't make me question my perspective on the world as it is today, it makes me wonder how true the history books reflected reality at that time.