To fulfill the obligations which our government has supposedly done in our names. We have ceded responsibility, and therefore ceded our rights, abdicated as sovereigns, on a million and one items along the way. If I have a store, which is successful, and it grows to a chain of stores, I need managers for those stores, being unable to occupy multiple coordinates of space at the same time. Call the sheriff and get warrants or whatever, and cure the problem. However, when you find the sheriff sitting behind what was formerly YOUR desk, and the judge is a brother in law of the manager, you begin to get the idea of the situation we are now in.
Government operates by delegated powers.
Thus the basis of the common law. I can drag you into court if you have damaged me, endangered me, killed me, or otherwise intruded into my life. The authority to right a wrong is the only power which can be delegated. There is no other premise for this Constitutional republic. If I do not possess a right, I can hardly cede that right to government to exercise.