Freedom is....
being satisfied with your situation.
There are some more objective factors included in the Magna Carter, the U.S. Constitution etal but personal freedom is more or less based on your own belief that at some point you can tell the government to "stick it", for which the consequences may be loss of status and quality of life but not result in loss of your life and freedom of movement.
Some people need more freedom than others, which is why we desperately need new frontiers.