Unit Big Picture
This unit examines political institutions, the formal structures and organizations within a government—such as legislatures, executives, and judiciaries—that create, enforce, and apply policy. We will compare how these institutions are designed and function across the six course countries. The central question is how the arrangement of these branches, particularly the relationship between the executive and the legislature, determines the concentration of political power, the mechanisms for accountability, and the overall stability and character of the political system.
Core Themes Across Cases
Theme 1: Fusion vs. Separation of Powers
In parliamentary systems like the United Kingdom, the executive and legislative branches are fused, as the prime minister and cabinet are drawn from the legislature. In presidential systems like Mexico and Nigeria, the branches are separate and independently elected. Russia's semi-presidential system creates a hybrid with a directly elected president and a prime minister responsible to the legislature.
This structural difference fundamentally shapes policymaking and accountability. Fusion of powers can lead to more efficient and rapid policy creation, but it weakens checks on executive authority. Separation of powers creates more robust checks and balances but can result in policy gridlock and conflict between branches.
Theme 2: Formal Constraints on Power vs. Political Reality
Democratic regimes institutionalize checks on executive authority through formal rules. Mexico’s single six-year presidential term (the sexenio) is a rigid constitutional limit designed to prevent the consolidation of personal power. The UK's vote of no confidence provides a mechanism for the legislature to remove the executive.
In authoritarian regimes, formal institutions often exist but are subordinate to the power of the ruling party or leader. China’s National People’s Congress is constitutionally the highest state body but in practice serves to legitimize decisions made by the Communist Party. Similarly, Russia's constitutional courts and legislature have been unable to prevent the erosion of presidential term limits, demonstrating that formal rules are less consequential than informal power dynamics.
Concept-to-Countries Overview
| System Type | Country Example(s) | Key Feature | Why it matters |
|---|---|---|---|
| Parliamentary | United Kingdom | Executive (PM) chosen from legislature | Fused power; high legislative efficiency |
| Presidential | Mexico, Nigeria | Executive elected separately from legislature | Separation of powers; robust checks |
| Semi-Presidential | Russia | Dual executive (President & PM) | Potential for cohabitation or power imbalance |
| Judicial Independence | Country Example(s) | Defining Characteristic | Why it matters |
|---|---|---|---|
| High | United Kingdom | Judiciary can effectively check other branches | Upholds rule of law; protects rights |
| Variable/Limited | Mexico, Nigeria | Formal independence, but susceptible to political pressure | Rule of law is inconsistent or fragile |
| Low/Subordinate | China, Russia, Iran | Judiciary is a tool of the ruling party/theocracy | Rule of law is weak; state power is unchecked |
Institution–Actor–Function Map
| Institution | Actor(s) | Function/Role (across cases) | Why it matters |
|---|---|---|---|
| Executive | President, Prime Minister, Supreme Leader, Cabinet | Implements laws, directs foreign policy, manages bureaucracy | Concentrates day-to-day government authority |
| Legislature | Parliament, Congress, Assembly members/deputies | Debates and passes legislation, approves budgets, provides oversight | Represents the populace and checks executive power |
| Judiciary | Supreme Court, Constitutional Court, local judges | Interprets laws, resolves legal disputes, exercises judicial review | Upholds the rule of law and constitutionalism |
Indicators & Operationalization
| Indicator | Definition (per CED) | What it captures | Limits/Notes |
|---|---|---|---|
| Judicial Independence | The extent to which the judiciary is free from influence by other branches of government. | The court's ability to enforce the rule of law impartially, even against powerful state actors. | Formal constitutional protections do not guarantee actual independence, which can be undermined by political appointments or intimidation. |
| Legislative Independence | The degree to which a legislature is capable of taking actions independent of the executive branch. | The legislature's power to initiate and pass laws, amend budgets, and conduct meaningful oversight. | A legislature may exist on paper (e.g., China's NPC) but lack the political power to act as a genuine check. |
Evidence Starter Pack
UK Prime Minister's Questions (PMQs): A weekly session where the Prime Minister must answer questions from legislators. It is a clear, public example of executive accountability within a fused-power parliamentary system.
Mexico's Sexenio: The constitutional single six-year term for the president. This is a powerful formal check on executive power, designed to prevent the reemergence of a dictatorship.
China's National People's Congress (NPC): The country's unicameral legislature. While constitutionally powerful, it acts as a "rubber stamp" for the Chinese Communist Party, illustrating how a legislature can lack independence in an authoritarian state.
Russia's 2020 Constitutional Amendments: These changes allowed President Putin to reset his term limits. This event demonstrates the subordination of formal constitutional rules to the power of the executive in a hybrid regime.
Iran's Guardian Council: A body of twelve clerics and jurists that vets all legislation and political candidates. It exemplifies theocratic control over both the legislative and electoral processes, limiting the power of elected institutions.
Nigeria's Supreme Court: This court has, at times, demonstrated independence by nullifying election results or ruling against the executive. It serves as an example of an institution attempting to assert its authority and uphold the rule of law in a fragile democracy.
Vote of No Confidence (UK): The mechanism by which a parliamentary majority can remove a prime minister and their cabinet. It is the ultimate legislative check on the executive in a parliamentary system.
Iran's Supreme Leader: The head of state who holds ultimate political and religious authority, with power over the executive, legislative, and judicial branches. This institution illustrates the concentration of power in a theocracy.
Topic Navigator
| Topic Title | What This Adds (≤10 words) |
|---|---|
| 2.1: Parliamentary, Presidential, & Semi-Presidential Systems | Defines the three core institutional frameworks. |
| 2.2: Comparing Systems | Compares how these systems select and remove executives. |
| 2.3: Executive Systems | Distinguishes between head of state and head of government. |
| 2.4: Executive Term Limits | Explains term limits as a check on executive power. |
| 2.5: Removal of Executives | Details formal processes like impeachment and votes of no confidence. |
| 2.6: Legislative Systems | Introduces unicameral versus bicameral legislative structures. |
| 2.7: Independent Legislatures | Assesses the actual power of a legislature versus the executive. |
| 2.8: Judicial Systems | Describes judicial structures and the power of judicial review. |
| 2.9: Independent Judiciaries | Explains why judicial independence is crucial for rule of law. |
Exam Skills Focus
Comparison: Contrast the fusion of powers in the UK's parliamentary system with the separation of powers in Mexico's presidential system.
Mechanism: An independent judiciary with the power of judicial review (e.g., Nigeria) can overturn executive actions, thereby checking executive power.
Change Over Time: Russia: from post-Soviet constitutional term limits → 2020 amendments removing limits → continuity of centralized executive power.
Common Misconceptions & Clarifications
"Head of State" (ceremonial/symbolic leader) and "Head of Government" (chief executive) are often separate roles, especially in parliamentary systems.
A semi-presidential system is not simply a "mix" of the other two; it is defined by a dual executive (a president and a prime minister).
The existence of a legislature does not mean it holds significant power; many authoritarian regimes use them to appear democratic.
One-Paragraph Summary
Unit 2 demonstrates that the formal design of political institutions—the executive, legislature, and judiciary—is fundamental to how political power is exercised and constrained. The core distinction between parliamentary (UK), presidential (Mexico, Nigeria), and semi-presidential (Russia) systems establishes different relationships of accountability and potential for policy gridlock. Across all systems, the true measure of democratic governance lies in the strength of institutional checks, such as executive term limits, legislative oversight, and judicial independence. Comparing the robust, independent judiciary in the UK with the politically subordinate courts in China and Iran reveals how these institutions can either uphold the rule of law or serve as instruments of state power, ultimately defining the line between democratic and authoritarian rule.