Getting philosophical for a moment, the purpose of liberty to is to allow us to exercise our free will and the purpose of the founding of America was to provide liberty for all - the exercise of free will. But do we have free will?
Besides being humorous, the play/movie Rosencrantz and Guildenstern are Dead is a study in free will versus determinism. There's an interesting take on the play in the second video below, but first here's a trailer from the movie in case you haven't heard of the play. The movie stars Gary Oldman and Tim Roth.