1.3 Political Systems

Categorizing Political Systems

Political scientists classify countries by their regime type, which shapes the relationship between citizens and the state. Key categories include presidential, parliamentary, and semi-presidential (hybrid) systems, plus broader classifications like democracy and authoritarian regimes. These labels help compare how power is structured, gained, and exercised across the six AP course countries.

Presidential vs. Parliamentary Systems

In presidential systems, the executive (president) is elected separately from the legislature and serves a fixed term, creating a separation of powers (e.g., Nigeria, Mexico). In parliamentary systems, the executive (prime minister) emerges from and is accountable to the legislature, which can remove them via a vote of no confidence (e.g., UK). This fusion of powers ties the executive's survival to legislative support.

Democracy vs. Authoritarianism

Democracies feature free and fair elections, protection of civil liberties, and accountability of leaders to citizens. Authoritarian regimes concentrate power, limit political competition, and restrict freedoms; examples range from one-party states (China) to electoral authoritarian systems (Russia, Iran) that hold elections lacking genuine competitiveness. Regime type affects political legitimacy, stability, and how policy is made.

Key terms

Presidential system

Executive elected separately from the legislature, serving a fixed term with separation of powers (e.g., Nigeria, Mexico).

Parliamentary system

Executive (PM) drawn from and accountable to the legislature; can be removed via a vote of no confidence (e.g., UK).

Semi-presidential system

Hybrid system with both a popularly elected president and a prime minister accountable to parliament.

Vote of no confidence

A legislative procedure that can remove a prime minister/government that has lost majority support.

Electoral authoritarianism

A regime that holds elections for legitimacy but manipulates them to prevent genuine competition (e.g., Russia, Iran).

Try an AP-style question

A state differs from a nation because a state is…

1. a political unit with sovereignty
2. a single ethnic community
3. a group sharing a culture
4. a region inside a country