Separation of powers and checks and balances, with Nigerian examples

Separation of powers and checks and balances are two of the most frequently examined concepts in Government. They come up in JAMB objective questions, WAEC and NECO theory papers, and Post-UTME screening. To answer them well, you need the theory and real Nigerian examples.

The three organs of government

Every modern government performs three main functions, carried out by three organs:

At state level, the equivalents are the State House of Assembly, the Governor and the State Executive Council, and the state courts.

What separation of powers means

Separation of powers is the principle that the three functions of government should be carried out by separate organs, staffed by different people, each independent of the others. No single person or body should hold all the powers of government.

The idea is most closely associated with the French philosopher Baron de Montesquieu, who set it out in The Spirit of the Laws (1748). He argued that when the same person or body makes, executes and judges the laws, liberty is lost, because there is nothing to stop that power being abused.

The three elements of the doctrine

1. Separation of functions: each organ performs its own function.
2. Separation of personnel: no person should be a member of more than one organ at the same time.
3. Independence: no organ should control or dominate another.

Why separation of powers matters

• It prevents tyranny by stopping power from being concentrated in one person or group.
• It protects citizens' rights and liberties.
• It promotes efficiency through specialisation.
• It ensures accountability, since each organ can be held responsible for its own function.
• It strengthens the rule of law, with an independent judiciary able to check unlawful actions.

Checks and balances

Complete separation would be impractical: the organs would be unable to cooperate, and any one of them could still abuse its own power. So constitutions add checks and balances, arrangements that allow each organ to limit the others.

Separation of powers divides power; checks and balances make sure that each division can be restrained by the others.

Checks and balances in Nigeria

Nigeria's 1999 Constitution (as amended) establishes a presidential system with clear separation of powers and many checks and balances.

How the legislature checks the executive

• Confirmation of appointments: the Senate must confirm ministers, ambassadors and other key appointees nominated by the President.
• Control of finance: the National Assembly must approve the budget (the Appropriation Bill); the executive cannot spend public money without it.
• Impeachment: the National Assembly can remove the President or Vice-President for gross misconduct, following the procedure in the Constitution.
• Oversight and investigation: committees can investigate ministries and agencies and summon officials.
• Overriding a veto: if the President refuses to sign a bill, the National Assembly can pass it into law with a two-thirds majority in each house.

How the executive checks the legislature

• Veto power: the President can refuse assent to a bill passed by the National Assembly.
• Initiating legislation: the executive prepares the budget and proposes many bills.

How the executive checks the judiciary

• Appointment of judges: the President appoints the Chief Justice of Nigeria and other senior federal judges on the recommendation of the National Judicial Council, subject to Senate confirmation for some offices.
• Prerogative of mercy: the President (and governors, at state level) can pardon convicted persons, on the advice of the relevant advisory council.

How the judiciary checks the other organs

• Judicial review: the courts can declare laws passed by the legislature, or actions taken by the executive, null and void if they conflict with the Constitution.
• Interpretation of the Constitution: the courts settle disputes between organs and between levels of government.
• Election petitions: tribunals and courts decide disputes over the conduct and results of elections.

How the legislature checks the judiciary

• Confirmation of judicial appointments (the Senate for the Chief Justice and Justices of the Supreme Court).
• Making laws on the structure and jurisdiction of courts, within the limits of the Constitution.
• Removal of senior judges for misconduct, under the procedure set out in the Constitution.

Separation of powers in presidential and parliamentary systems

This is a common examination comparison. In Nigeria, a member of the National Assembly who is appointed a minister must resign their legislative seat.

Limitations of separation of powers

No country practises absolute separation of powers. Limitations include:

• Overlapping functions: the executive makes regulations (delegated legislation), and the legislature performs quasi-judicial functions, as in impeachment.
• Appointment of judges by the executive can raise concerns about judicial independence.
• Party politics: when the same party controls the executive and legislature, checks can become weaker in practice.
• Military rule suspends separation of powers entirely. Under military regimes in Nigeria, the ruling military council made and executed laws by decree.
• Emergency powers can temporarily concentrate authority in the executive.

How to answer exam questions on this topic

• Define terms precisely, and credit Montesquieu.
• Use Nigerian examples such as Senate confirmation, budget approval, the presidential veto and judicial review.
• Distinguish clearly between separation of powers (division of power) and checks and balances (mutual restraint).
• For "advantages" or "limitations" questions, give each point a clear heading and a sentence or two of explanation.

Test yourself

1. Which political philosopher is most associated with the theory of separation of powers?
2. Give one way the Nigerian legislature checks the executive.
3. What is judicial review?
4. Why is separation of powers weaker in a parliamentary system?

Answers: 1. Baron de Montesquieu. 2. Any one of: confirming appointments, approving the budget, impeachment, oversight, or overriding a veto. 3. The power of the courts to declare laws or executive actions unconstitutional, null and void. 4. Because the executive (the Prime Minister and Cabinet) is drawn from and sits in the legislature, so there is fusion of personnel.

Practise with explanations

Organs of government and separation of powers are covered in Levia's Government Level 2 (Structures and Systems of Government), and rule of law and the Constitution feature in Civic Education. Every question has a clear explanation.