Local governments are the lowest level of elected government within a state. They provide local public services and implement national welfare services. Approaches to local governance include centralization, where power is concentrated at the national level, and decentralization, which transfers authority to local governments and organizations. Decentralization can occur through deconcentration, delegation, devolution, or privatization. Local governments play an important role in governance according to Aristotle's view that they are better governed by good people than just good laws alone.