The United States proved that it could. While many freedoms have been encroached, the opportunity and the ability to regain those lost freedoms remain. Some may be pessimistic that true freedom will ever come to the United States. They see the constant expansion of government and its ill-effects on us all. But I'm more hopeful.
Freedom lets more people live better, more fulfilling lives than any other system.
History and logic support that. The journey towards true liberty will be hard and filled with lots of pit-falls, but in the end, we will win. If you are a Free-Market. But the spirit of the Declaration lives on. The United States proved that it could.