Wartime Violence Fuels Enemy Hatred—Not Voting, Trust, or Altruism

🔎 Why This Question Matters

Understanding how exposure to wartime violence shapes postwar societies is central to predicting political stability, reconciliation prospects, and the success of peacebuilding efforts. Joan Barcelo evaluates the long-run attitudinal and behavioral legacies of violence to clarify whether war hardens societies inward or drives civic repair.

🧭 What Joan Barcelo Did

This paper reports a meta-analysis of 172 quantitative studies from more than 50 countries, synthesizing evidence on 22 outcomes grouped into four broad areas: (a) civic and political engagement, prosociality, and social trust; (b) attitudinal hardening toward wartime enemies; (c) identification with one’s own wartime-aligned group; and (d) generalized attitudinal hardening toward actors not directly involved in the conflict.

📊 Key Findings

• Effects on civic and political engagement, prosocial behavior, and trust are mixed: wartime violence increases some forms of participation in certain settings, but it does not produce consistent increases in voting, social trust, or altruism.
• Wartime violence reliably raises hostility toward former adversaries and strengthens in-group identification and favoritism across diverse contexts.
• There is little consistent evidence that violence produces broader, generalized attitudinal hardening toward actors unconnected to the conflict.

🔬 What This Means for Scholarship and Policy

The results temper optimistic claims that conflict generates social cohesion or civic renewal. Instead, Barcelo's synthesis highlights a recurring pattern of intergroup hostility and stronger in-group bonds without corresponding gains in generalized trust or civic norms. These patterns suggest targeted reconciliation and intergroup-contact interventions are necessary to reduce lingering hostility and prevent the political exclusion of former opponents.

📌 Where Future Research Can Build

The meta-analysis points to unresolved questions about mechanisms and context: when and why violence spurs participation versus withdrawal, how duration and type of violence shape outcomes, and which reconciliation strategies most effectively convert reduced hostility into durable civic trust.