Three Systems of government Unitary System -centralized government in which local governments exercise only those powers given to them by the central government Confederal System-consists of a league of ndependent states, each having essentially sovereign power Federal system-power is divided by a written constitution between a central government and regional governmentsThree Systems of Government • Unitary System – centralized government in which local governments exercise only those powers given to them by the central government • Confederal System – consists of a league of independent states, each having essentially sovereign power • Federal System – power is divided by a written constitution between a central government and regional governments