Constitutional Violence

If constitutional legitimacy is based on violence, what does this mean for democracy? Almost every stat in the world has a written consitution. The great majority of these declare the constitution to be the law controlling the organs of the state. We tend to label western liberal political systems into a domain of politics where the people rule and a domain of law that is set aside for a trained elite. Legal, poltical and constitutional practices seem to be irreconcilable. Is good government feasible and is a constitutional system the best device to rule a country? Can the public and legal sovereignties be reconciled?