Power can shift in two different ways: governments change when new officeholders take power, while regimes change when the basic rules and institutions of politics are replaced. Elections, appointments, lines of succession, coups, and revolutions can all change who holds authority, but they do not all change the political system itself. For AP Comparative Government, separate a change in government from a change in regime before explaining the effects.
What Changes When Power and Authority Shift?
In AP Comparative Government, a change in government means new officeholders take power while the basic political system stays in place. A change in regime is bigger: the rules and institutions that structure political power are replaced, either gradually through reforms or suddenly through elections, coups, or revolutions.

Why This Matters for the AP Comparative Government Exam
This topic builds the vocabulary you need to explain political change clearly, which shows up across the AP Comparative Government exam. You will use these distinctions when you describe how authority shifts, explain why a transition counts as regime change or just a government change, and compare how different countries handle the transfer of power.
This part of the course is also conceptual, meaning you may need to explain how change works without a specific country attached. Practice explaining the how and why of a process, not just naming it. When a question gives you a scenario, your job is often to identify whether power is changing through established procedures or through coercive action, gradually or suddenly, and what source of authority replaces the old one.
Key Takeaways
- Governments change more often and more easily than regimes, usually through peaceful processes like elections, appointments, and lines of succession.
- Regime change happens when fundamental rules and institutions are replaced, either incrementally or suddenly.
- Regimes can change through elections, coups, or revolutions where a large share of the population supports a new political system.
- Democratic regimes can usually maintain sovereignty with less coercion because authority comes from elections, constitutions, and consent.
- Authoritarian regimes tend to rely more on coercion to keep control and defend sovereignty.
- Always separate a change in government (new officeholder) from a change in regime (new rules and institutions).
Government Change vs. Regime Change
The central distinction here is government change versus regime change.
A government is the set of people and offices currently empowered to make binding decisions. Governments change relatively often and often peacefully. A new prime minister, a newly elected president, or a successor taking office through a line of succession all count as government change. The underlying political system stays the same.
A regime is the set of fundamental rules that control access to and the exercise of political power. Regime change is bigger. It means those core rules and institutions get replaced, either slowly over time or suddenly. A revolution or coup that rewrites how power works is regime change, not just a swap of officeholders.
When you read a scenario, ask: did the basic rules of the system change, or did only the people in charge change? That question alone answers most prompts on this topic.
How Power Changes
Power can shift through several mechanisms:
- Elections: the most common peaceful way governments change within an existing system.
- Appointments: leaders or officials placed into office through established procedures.
- Lines of succession: a built-in, usually peaceful process for who takes power next.
- Coups d'etat: a sudden seizure of power, often led by the military or political elites.
- Revolutions: broad popular support drives a change in the political system itself.
- Constitutional or institutional reforms: rules change incrementally, which can gradually replace core political rules.
Elections, appointments, and succession usually produce government change. Coups and revolutions are the routes most likely to produce regime change, because they tend to replace the rules and institutions themselves.
Democratic and Authoritarian Regimes Use Power Differently
How a regime uses power to defend its sovereignty depends heavily on whether it is democratic or authoritarian.
Democratic regimes can usually maintain sovereignty with less coercion. Their authority rests on elections, constitutions, rule of law, and citizen consent, so when leaders lose an election, power can transfer peacefully without tearing down the whole system.
Authoritarian regimes typically depend on greater coercion to preserve control and defend sovereignty. Change can still happen, but it is more likely to come through elite succession, controlled appointments, coups, or popular uprisings rather than open elections.
Country Examples
These examples show revolutionary or elite-led change reshaping authority. Use them as applications of the concepts above.
- Iran's 1979 Revolution: broad popular support replaced the Pahlavi monarchy with an Islamic republic. Both the source of authority and the structure of the regime changed, which makes it regime change, not just a government change.
- Nigeria: Nigeria has experienced military coups and transitions between military and civilian rule. These show how elite-led change can reshape authority and replace one set of governing rules with another.
When you bring in a country example, explain the mechanism of change and the source of authority that replaced the old one. Connect the event to institutions, legitimacy, sovereignty, and the role of citizens or elites.
How to Use This on the AP Comparative Government Exam
Conceptual Analysis
This topic fits well with conceptual prompts that ask you to explain a process without a required country. Be ready to:
- Explain the steps of how a regime changes versus how a government changes.
- Explain why coups and revolutions are more likely to cause regime change than elections.
- Link a cause (lost election, military seizure, mass uprising) to an effect (peaceful transfer, regime collapse, new political system).
Comparison
When a prompt asks you to compare countries, line up the mechanism of change and the source of authority in each case. For example, compare a peaceful electoral transfer with a revolutionary overthrow and explain how the use of power differed.
Common Trap
Do not stop at naming a change. Explain the how or why. Saying "Iran had a revolution" is not enough; explain that the revolution replaced the monarchy's authority with religious and constitutional authority, which is what makes it regime change.
Common Misconceptions
- A new leader always means regime change. Most leadership changes are government change. The system has to change for it to count as regime change.
- All regime change happens suddenly. Regime change can be incremental, happening gradually through institutional and rule changes, not only through coups or revolutions.
- Coups and revolutions are the same thing. A coup is usually a sudden seizure of power by the military or elites. A revolution involves broad popular support for changing the political system.
- Democracies never use coercion. Democratic regimes can use state power, but they usually need less coercion because their authority rests on elections, consent, and rule of law.
- Authoritarian regimes never change. They can change through elite succession, controlled appointments, coups, or popular uprisings; the path just tends to look different from a democratic election.
Related AP Comparative Government Guides
Frequently Asked Questions
What is the difference between government change and regime change?
Government change means new leaders or officeholders take power while the basic political system stays the same. Regime change means the fundamental rules and institutions for exercising power are replaced.
How do governments change in AP Comparative Government?
Governments usually change through elections, appointments, or lines of succession. These changes replace officeholders more often than they replace the political system itself.
How do regimes change?
Regimes change when rules and institutions are replaced gradually or suddenly. AP Comparative Government examples include elections that reshape institutions, coups, revolutions, or major constitutional reforms.
Why do democratic and authoritarian regimes use power differently?
Democratic regimes often rely more on elections, constitutions, rule of law, and consent to maintain sovereignty. Authoritarian regimes tend to rely more on coercion, controlled appointments, and limits on competition.
Why are Iran and Nigeria important examples for change in power and authority?
Iran illustrates regime change when the 1979 Revolution replaced the Pahlavi monarchy with an Islamic republic. Nigeria illustrates how military coups and transitions between military and civilian rule can reshape authority.
How does Topic 1.6 show up on the AP Comparative Government exam?
Topic 1.6 can appear in conceptual analysis, comparison, and scenario-based questions. Be ready to identify the mechanism of change, explain whether it affects government or regime, and connect it to sovereignty or authority.