Perhaps it would be more accurate to say, 'appeared to be founded upon'. There was another agenda at work at the same time. Same old, same old.especially within the Christian religion that this country was founded upon.
Messiah Jesus showed the way in giving women respect, but it only works for us if we (men included) have taken on board the power of His death and resurrection. There is no other true freedom, nor can be, where God is not worshipped - where hearts are hard as stone to Him.