Civil war

A civil war is a violent conflict fought within a single country between organized groups seeking to control the central government or a region, or to change government policies. It is distinguished from other forms of internal conflict by its scale, duration, and the involvement of state and non-state actors in sustained military operations. Civil wars are among the most devastating forms of warfare, causing immense human suffering, economic collapse, and long-term societal trauma.

Definition and Characteristics

The academic study of civil wars often employs quantitative thresholds to distinguish them from lower-intensity conflicts. A widely used definition, such as that from the Correlates of War project and the Uppsala Conflict Data Program, requires a conflict to result in at least 1,000 battle-related deaths per year, with the opposing forces being from the same state and the stronger side being the government. Key characteristics include the existence of a recognized governmental authority, the presence of a rebel group capable of effective resistance, and a high level of violence sustained over time. Civil wars are typically fought over issues of political power, territorial control, ethnic or religious dominance, or economic resources.

Causes and Theoretical Explanations

Scholars have proposed numerous theories to explain the onset of civil wars, often categorized into greed versus grievance frameworks.

Grievance-Based Theories: These focus on perceived injustices, such as political repression, economic inequality, ethnic or religious discrimination, and lack of self-determination. Groups that feel systematically marginalized may resort to violence as the only means to redress their grievances. Relative deprivation—the gap between expected and actual economic or social conditions—is a key concept here.

Greed-Based Theories: Associated with scholars like Paul Collier, this perspective emphasizes the role of economic opportunities in fueling rebellion. It argues that when rebels can finance their operations through the capture of natural resources (like diamonds, oil, or drugs) or through external support, the feasibility of rebellion increases, regardless of the initial grievances. The presence of "lootable" resources can make conflict more likely and prolonged.

Structural and Institutional Factors: Weak or failing states with limited legitimacy and poor governance are more susceptible to civil war. Other factors include rough terrain that favors insurgency, a history of previous conflict, large youth populations ("youth bulges"), and external intervention that can empower rebel groups.

Phases and Dynamics

Civil wars often follow a recognizable trajectory, though each conflict is unique.

Onset and Mobilization: Conflicts usually begin with a triggering event, such as a political assassination, disputed election, or crackdown on protests. Rebel groups form, drawing on networks of shared identity or ideology, and seek resources and recruits. The government responds with counter-insurgency measures.

Conflict Prolongation: Civil wars are notoriously difficult to end. They can create "war economies" that benefit certain actors, entrench hatreds, and fragment societies. Fighting may reach a stalemate where neither side can achieve a decisive victory but both can continue fighting. Splintering of factions can complicate peace processes.

Termination and Outcomes: Civil wars end through military victory (by the government or rebels), negotiated settlement, or, less commonly, stalemate and ceasefire. Outcomes vary widely: some lead to democratization and peacebuilding, while others result in authoritarian consolidation, partition of the state, or a relapse into violence.

Impacts and Consequences

The consequences of civil war are profound and long-lasting.

Humanitarian Costs: These conflicts cause massive casualties, both direct and indirect from disease and malnutrition. They produce large numbers of refugees and internally displaced persons, disrupt food systems, and destroy healthcare infrastructure. Widespread human rights abuses, including atrocities against civilians, are common.

Economic Destruction: Civil wars devastate infrastructure, divert resources from productive investment to military spending, scare away foreign investment, and disrupt trade. They can set back a country's development by decades and create persistent poverty traps.

Social and Political Legacies: Societies emerging from civil war often suffer from deep communal distrust, weakened social cohesion, and a culture of violence. Rebuilding legitimate political institutions is a major challenge. The presence of small arms, traumatized populations, and unresolved grievances can create a high risk of conflict recurrence.

Historical and Contemporary Examples

Historical examples include the American Civil War (1861-1865), fought over slavery and states' rights; the Spanish Civil War (1936-1939), a prelude to World War II involving ideological and international dimensions; and the Chinese Civil War (1927-1949, with pauses). Prominent late-20th and 21st-century civil wars include those in Lebanon (1975-1990), Sri Lanka (1983-2009), the former Yugoslavia (1991-1995), Syria (2011-present), and Yemen (2014-present). These conflicts illustrate the diverse causes, from ethnic nationalism and sectarianism to struggles over political transition and regional proxy competition.

International Dimensions

Modern civil wars are rarely purely internal. External actors often play decisive roles by providing military support, financing, diplomatic backing, or safe havens to warring parties. This can turn a domestic conflict into an internationalized civil war, as seen in Syria and Yemen. International organizations and neighboring states may also intervene for humanitarian reasons or to pursue their own strategic interests. The laws of war and international humanitarian law apply to civil conflicts, though compliance is often weak.