A constitution is a set of fundamental principles or established precedents that defines how a state is governed, allocating power between institutions and levels of government. In AP Comp Gov, constitutions are a key source of authority (1.5), but having one doesn't guarantee a regime follows it.
A constitution is the foundational set of rules and precedents that establishes how a state is governed. It typically lays out who holds power, how leaders are chosen, how power is divided between national and local governments, and what rights citizens have. The CED lists constitutions among the major sources of power and authority in political systems, alongside religions, militaries, political parties, legislatures, and popular support.
Here's the twist that makes this a Comp Gov term and not just a civics term. All six course countries have constitutions, but they vary wildly in form and in force. The UK's constitution is uncodified, meaning it isn't a single written document but a collection of laws, traditions, and court decisions. Iran's 1979 constitution fuses theocratic authority (Sharia law, the Supreme Leader) with elected institutions. China and Russia have detailed written constitutions that the ruling party or executive can override in practice. So the real question on the exam is never "does this country have a constitution?" It's "how much does the constitution actually constrain power?"
Constitutions sit at the center of Unit 1. Topic 1.5 (AP Comp Gov 1.5.A) names constitutions as a source of power and authority, and regime changes in course countries often run through constitutional change, like Iran's 1979 shift to a theocracy based on Islamic Sharia law. Topic 1.7 (AP Comp Gov 1.7.A) is built on constitutional structure too. Mexico, Nigeria, and Russia have constitutionally established federal systems that divide power between levels of government, while China, Iran, and the UK are unitary states that concentrate power nationally. The term also reaches into Unit 3. Topic 3.7 (AP Comp Gov 3.7.A) asks how far civil rights and civil liberties are protected or restricted across regimes, and constitutions are where those protections live on paper. Topic 3.2 connects because a population's political culture shapes what its constitution values, like the balance between social order and individual liberty.
Keep studying AP Comparative Government Unit 1
Constitutionalism (Unit 1)
A constitution is the document; constitutionalism is the habit of actually obeying it. Russia has a constitution full of guaranteed rights, but weak constitutionalism means the executive routinely works around it. This gap is the single most testable idea attached to this term.
Federal and Unitary Systems (Unit 1)
The constitution is where a country's federal or unitary structure gets written down. Mexico, Nigeria, and Russia constitutionally divide power between national and regional governments, while China, Iran, and the UK keep power concentrated at the national level.
Civil Rights and Civil Liberties (Unit 3)
Constitutional rights on paper don't equal rights in practice. China's constitution promises free speech, yet the Great Firewall restricts media access to maintain political control. Comparing written protections to actual practice is a classic Comp Gov move.
Judicial Review (Unit 2)
A constitution only has teeth if some institution can enforce it. Judicial review is the power of courts to strike down laws that violate the constitution, so weak or politically controlled courts mean a constitution that can't defend itself.
Constitutions show up most often as the factual setup for comparison questions. The 2018 SAQ stated flat out that "Nigeria and Russia both have constitutionally established federal systems" and then asked about how federalism works in each, so you need to know which course countries are constitutionally federal (Mexico, Nigeria, Russia) and which are unitary (China, Iran, UK). Multiple-choice questions lean on the paper-versus-practice gap, like asking why Russia restricts civil liberties despite constitutional guarantees, or how civil rights protections differ between Nigeria and the UK. The skill being tested is not reciting what a constitution says. It's explaining whether and how a regime's actual behavior matches its constitutional design, and using country-specific evidence to prove it.
A constitution is a document; constitutionalism is a practice. A constitution lays out rules for governing, while constitutionalism means the government actually treats those rules as binding limits on its own power. Nearly every country has a constitution, including authoritarian ones, but only regimes with real rule of law have constitutionalism. China's constitution lists civil liberties, yet the Communist Party operates above it, so China has a constitution without constitutionalism. If an exam question highlights a gap between written rights and actual practice, constitutionalism (or its absence) is the concept being tested.
A constitution is the fundamental set of rules establishing how a state is governed, and the CED lists it as a major source of power and authority alongside religion, the military, parties, and popular support.
All six course countries have constitutions, but having one is not the same as following one; authoritarian regimes like China and Russia have written constitutions that the ruling party or executive can override in practice.
Mexico, Nigeria, and Russia have constitutionally established federal systems, while China, Iran, and the UK are unitary states that concentrate power at the national level.
The UK's constitution is uncodified, meaning it's built from statutes, traditions, and precedents rather than a single written document.
Iran's 1979 constitution created a theocracy based on Islamic Sharia law, showing how constitutional change can mark a complete regime transition.
On the exam, the strongest answers compare constitutional promises (like civil liberties protections) to actual government behavior, not just what the document says.
A constitution is the set of fundamental principles or established precedents by which a state is governed. The CED treats constitutions as a source of power and authority, and all six course countries (China, Iran, Mexico, Nigeria, Russia, UK) have one in some form.
No. Authoritarian regimes like China and Russia have detailed written constitutions, but the ruling party or executive operates above them in practice. Democracy depends on constitutionalism, the actual enforcement of constitutional limits, not the mere existence of a document.
A constitution is the written (or unwritten) set of governing rules; constitutionalism is when the government genuinely treats those rules as binding limits on its power. China has a constitution but lacks constitutionalism because the Communist Party stands above the law.
The UK has a constitution, it's just uncodified. Instead of one document, it consists of statutes, court rulings, and long-standing traditions. Despite that, the UK shows strong constitutionalism, which is the opposite of countries with written constitutions that go ignored.
Mexico, Nigeria, and Russia have constitutionally established federal systems that divide power between national and regional governments. China, Iran, and the UK are unitary. A 2018 released SAQ tested exactly this fact about Nigeria and Russia.