Coup d'État: Mechanics, Types, and Global Impact
A coup d'état (French for "stroke of state"), often shortened to a coup, is an illegal and overt attempt by military organizations or government elites to remove an incumbent leader or leadership from power. Unlike a general revolution, which typically involves mass public mobilization, a coup is generally characterized by a sudden seizure of power by a small group of insiders.
Historically, the prevalence of coups has fluctuated. Between 1950 and 2010, an estimated 457 coup attempts occurred, with roughly half resulting in success. While peaks were observed in the mid-1960s, mid-1970s, and early 1990s, the overall number of successful coups has decreased over time. Interestingly, coups occurring after the Cold War have been more likely to lead to democratic systems than those occurring during the Cold War, although they still frequently perpetuate authoritarian rule.

Key Facts
- Definition: An illegal seizure of power by military or government elites.
- The Coup Trap: A phenomenon where a high cumulative number of past coups serves as a strong predictor of future coups.
- Success Rate: Approximately 50% of coup attempts between 1950 and 2010 were successful.
- Cold War vs. Post-Cold War: Post-Cold War coups are more likely to result in democratization than their predecessors.
- Authoritarian Resilience: Failed coups in authoritarian systems often strengthen the existing ruler's grip on power.
Types of Coups
While the classic military coup is the most recognized, political science identifies several variations based on who initiates the action and the methods used.
Internal and Elite Coups
- Self-coup: Occurs when a leader who came to power legally attempts to remain in power through illegal means.
- Palace coup: A seizure of power within the inner circle of a regime.
- Putsch: A sudden, violent attempt to overthrow a government.
Specialized and Modern Variations
- Constitutional coup: The use of legal loopholes or ambiguities to remove a leader while maintaining a facade of constitutionality.
- Medical coup: A leader is removed after being declared incapacitated by medical professionals (e.g., Tunisia in 1987).
- Soft coup: A non-violent removal of leadership through political pressure or manipulation.
- Counter-coup: A coup specifically designed to repeal the results of a previous coup.
Predictors and Mechanics of Success
The success of a coup is often driven by the plotters' ability to convince others that the takeover is inevitable. Various structural and personal factors influence whether a coup is attempted and if it succeeds.
Key Influencing Factors
Research indicates that several variables increase the risk of a coup, including:
- Military Grievances: Personal or organizational frustrations within the officer corps.
- Economic Conditions: Economic decline and undiversified exports.
- Political Climate: Domestic political crises, non-inclusive institutions, and a lack of regime legitimacy.
- External Pressures: Participation in war, external threats, or collusion with foreign military powers.
- Regional Trends: "Coup contagion," where a coup in one country inspires similar attempts in neighboring regions.
Coup-Proofing
To prevent these events, some leaders engage in coup-proofing—the practice of creating safeguards to prevent the military from overthrowing the government. This can include creating competing security agencies or restructuring the military to ensure loyalty, though this often reduces overall military effectiveness.
Historical Data and Outcomes
The impact of coups varies significantly depending on the era and the initial regime type. The following table summarizes the trends in coup attempts and outcomes.
| Time Period | Initial Regime Type | % Facing Coups | Avg. Attempts/Year | Success Rate (Avg/Year) |
|---|---|---|---|---|
| 1950–1990 (Cold War) | Autocracies | 49% | 5.575 | 3.125 |
| 1950–1990 (Cold War) | Democracies | 35% | - | - |
| 1990–2015 | Autocracies | 12% | 1.96 | 0.8 |
| 1990–2015 | Democracies | 12% | - | - |
Recent Examples of Coup-Derived Leadership
In recent years, several leaders have assumed power through coups across Asia and Africa. Notable examples include:
- Burma (2021): Min Aung Hlaing deposed Aung San Suu Kyi.
- Egypt (2013): Abdel Fattah el-Sisi deposed Mohamed Morsi.
- Niger (2023): Abdourahamane Tchiani deposed Mohamed Bazoum.
- Gabon (2023): Brice Clotaire Oligui Nguema deposed Ali Bongo Ondimba.
- Tunisia (2021): Kais Saied executed a self-coup, removing Hichem Mechichi.
Frequently Asked Questions
What is the difference between a coup and a revolution?
A coup is typically a sudden seizure of power by a small group of elites or military officers, whereas a revolution usually involves a broad-based mass movement of the general population to fundamentally change the social and political order.
What is a "self-coup"?
A self-coup occurs when a leader who was legally elected or appointed uses illegal means—such as suspending the constitution or dissolving the legislature—to maintain their hold on power and remove legal checks and balances.
What is the "coup trap"?
The coup trap is a political phenomenon where a country's history of frequent coups makes it more likely to experience future coups, creating a cycle of instability that is difficult to break.
Can a coup lead to democracy?
Yes. While many coups result in new dictatorships, some are termed "democratic coups" because they oust an authoritarian regime and lead to the establishment of a democratic system. This has been more common in the post-Cold War era.
How do leaders prevent coups?
Leaders use "coup-proofing" strategies, which may include diversifying the ethnic or political background of the military, creating multiple overlapping security agencies to spy on one another, and providing high incentives for loyalty.