Democracy: Waves, Systems, Electoral Rules, and Governance Outcomes

Democracy originates from the Greek word demokratia, combining demos (people) and kratos (rule).
Representative democracy is necessary in contemporary large-scale societies where direct participation in lawmaking is unfeasible.
Economist Joseph Schumpeter defined democracy as a political framework in which citizens select among competing political candidates in free, fair, and periodic elections.
Modern democracies are the dominant global form of government, with a majority of the world population residing in democratic states.

First Wave (18th Century–1930): Rooted in the American and French Revolutions, expanding voting rights across North America and Europe to encompass approximately $30$ democracies.
- Barrington Moore, Jr. concluded "No bourgeois, no democracy," identifying a strong, independent commercial middle class as a prerequisite for democratic transition.
- Receded in the 1930s due to military coups, fascism, and communism.
Second Wave (Post-World War II–1960s): Triggered by the defeat of fascism and post-colonial nation-building in Africa and Asia.
- Receded in the 1960s via authoritarian turns and military coups. Guillermo O'Donnell theorized that modernization activated lower-class demands, driving elites toward authoritarian responses to resolve economic instability.
Third Wave (1974–Late 1990s): Commenced in Portugal, Spain, and Greece, expanding across Latin America, Asia, Eastern Europe, and Africa.
21st Century Equilibrium ("Careening"): According to Dan Slater, contemporary democratization has flat-lined into a pattern of "careening," where regimes lurch between popular mobilization and elite institutional restraint.
Transitional Factors: Regional diffusion effects, support from international bodies like the European Union, and specific economic or structural conditions influence democratic durability.

Presidential Systems:
- Feature executive-legislative separation where sovereignty is shared between both branches.
- Presidents are directly elected for fixed terms and do not require legislative majorities to retain office.
- Provide higher voter accountability and direct selection of the executive.
- Risk executive-legislative gridlock (Juan Linz) and display a historically higher rate of democratic breakdown (Alfred Stepan and Cindy Skatch).
Parliamentary Systems:
- Feature executive-legislative fusion where direct sovereignty resides exclusively in the elected legislature.
- Prime ministers are chosen by the legislative assembly and remain in power only while maintaining its confidence.
- Produce higher legislative passage rates for executive proposals but require continuous coalition management.

District Formats: Single-member districts elect one representative per district, whereas multimember districts elect multiple representatives.
Voting Formulas:
- Plurality Rule: The candidate with the highest number of votes wins the seat, promoting two-party political systems.
- Double-ballot System: Requires a candidate to earn an absolute majority ( $>50\%$ ) to win; otherwise, a run-off election is held between top candidates.
- Proportional Representation (PR): Seats are allocated based on the percentage of total votes received by each party list, promoting multiparty systems.
Systemic Consequences:
- PR systems demonstrate higher legislative party discipline, yield greater representation for women, and foster more redistributive social policies.
- Kenneth Arrow's Impossibility Theorem proved that no electoral system can simultaneously fulfill all democratic criteria without flaws.

Economic Performance:
- Comparative research by Amartya Sen, Adam Przeworski, and Fernando Limongi demonstrates no direct causal link between regime type and economic growth rates.
- Democracies offer structural advantages: adherence to the rule of law, institutional adaptability, lower fertility rates, and protection against severe economic collapse (Halperin et al.).
Good Society Performance Indicators:
- Average Infant Mortality Rate (per $1{,}000$ live births): Full democracies ( $4.32$ ), flawed democracies ( $19.8$ ), hybrid regimes ( $37.8$ ), authoritarian regimes ( $44.7$ ).
- Average Adult Literacy Rate: Full democracies ( $99.2\%$ ), flawed democracies ( $91.1\%$ ), hybrid regimes ( $76.2\%$ ), authoritarian regimes ( $81.4\%$ ).
- Average Homicide Rate (per $100{,}000$ people): Full democracies ( $2.1$ ), flawed democracies ( $12.0$ ), hybrid regimes ( $13.9$ ), authoritarian regimes ( $10.8$ ).
Capability Impact: High levels of democracy consistently enhance physical well-being, literacy, and safety primarily within established "Full Democracies."