A unitary state is a form of government where most or all of the governing power resides in a central authority. In this system, local governments may exist, but they derive their authority from the central government and can be altered or abolished by it. Examples of unitary states include France and Japan. In a unitary state, laws and policies are typically uniform across the entire country, promoting consistency in governance. This contrasts with federal systems, where power is divided between central and regional authorities. Unitary states can be more efficient in decision-making and implementation of policies.