"The Magna Carta is an early reminder of the crucial difference between freedom and liberty. Liberty is freedom that is unique to humans, it is guaranteed by law. All animals are free, but in a system of humans total freedom is anarchy. Humans have thrived by letting a dominant authority regulate freedom. Liberty is a freedom that the authority has granted or has been persuaded to grant. For centuries, the state and the people have negotiated, peacefully and violently."