Constitutional Disclaimer: A product of its time and does not reflect the same values

Amazon.com has a copy of the Constitution, Bill of Rights, Declaration of Independence, and Articles of Confederation for sale that carries an interesting disclaimer, likely added by the publisher.  If you click the link above and then use the "LOOK INSIDE" feature at amazon, you can see it for yourself.  Here is a screenshot:

What the...?!?  A product of its time?  Does not reflect the same values as it would if it were written today?  Wow.  I couldn't be a joke, so either they meant it in the way that today's society at large doesn't maintain the same value system as it did back then, or the Constitution as written does not apply in today's world.  An observation on the current disposition of the document, perhaps?  Still, I wonder who signed off on that?

You can get a free, still relevant copy of the Constitution at heritage.org.