Separation of powers,classification of government powers,or the doctrine of checks and balance is the division of government powers into the three branches of legislative, executive and judicial powers,each to be exercised by a separate and independent arm of government as a preventive measure against abuse of power,which will occur if the three powers are exercised by the same person or group of people. Separation of powers is the division of the powers and functions of government among the three independent and separate arms of government among the three independent and separate arms of government; that is the legislature, executive and the judiciary, to act as a check and balance on one another and prevent the excesses and abuse of powers. Th origin of this doctrine started from the work of the French jurist BARON DE MONTESQUIEU, in his book The spirit of law,according to Montesquieu "political liberty is to be found only when there is no abuse of power. Experience shows that every man invested with power will abuse it by carrying as far as it will go, to prevent this abuse it is necessary from the nature of things that one power should be a check on another,when the legislature ,Executive and judiciary powers are united in the same person or body there can be no liberty again there is no liberty if the judicial power is not separated from the legislative and executive there would be an end to everything if the sane person or body whether of the nobles or the people,were to exercise all three powers.