Police are agents or agencies, usually of the executive, empowere to enforce the law and to effect public and social order through the legitimatized use of force. The term is most commonly associated with police departments of a state that are authorized to exercise the police power of that state within a defined legal or territorial area of responsibility. The word comes via French from the Latin politia (“civil administration”), which itself derives from the Ancient Greek πόλις, for polis ("city").