A large portion of this week's curriculum has been centered around analyzing documents and the ethical and moral values that they hold. For example, when the Declaration of Independence states that "All men are created equal," everyone besides the Thomas Jeffersons in the pinwheel discussion would point and dance on the fact that there was discrimination and falseness in those five words. The recurring theme of how it was wrong went throughout the rotations. However, I believe that it was not necessarily done with bad intentions.
During the time period, slavery and discrimination were thought of as nothing more than what society was and will be. It would not be until much later that these ethics would be challenged and abolished; but even then, things wouldn't be completely fixed for another couple of hundred years. The thing that really inhibits generations from being able to instantly adopt all of the same principles and technologies of the future is that you don't know what you don't know. An easy way understand this is if you were to go back into time with the engineering details to a spaceship and present it to the engineers of the time, they wouldn't even be able to comprehend what they're looking at. However, if someone from the distant or even near future were to visit us and do the same thing with something such as a time machine, we would all have the same reactions as the previous group. Maybe one day we'll look back and think "How dumb were we to have used cars. The risk and danger are off the charts now that we all have private mechanized planes."
All of this is to help justify the fact that the founding fathers, contrary to what Fredrick Douglas said, are brave and brilliant people who shouldn't have a blemish on their portfolios for not being able to see past the veil that time has put on them.