I can honestly say that I have never heard of this piece, let alone its influence on social organizations of the time. That being said, I cannot give it my endorsement for preservation, for kind of philosophical reasoning. I believe that while it did take us an unusual amount of time to get on the right track with equal rights (heck, we are still trying to get it right), it is one of those topics that I believe to be inherently common sense. It is hard for me to imagine that we would quickly lose the concept of equality if it were not for this piece. 
My question for you is, what effect (if any) do you believe this piece has had on the present day? Especially considering the male dominated cultures that still exist.