Why Every Conflict Is a Lose–Lose for Growth
The main research we are leaning on today is the Kellogg School of Management’s The Economic Price We Pay for War, a rigorous global analysis of 135 armed conflicts showing how war inflicts deep and persistent economic damage long after the fighting stops (Benmelech and Monteiro 2025). This study provides peer-review quality evidence that suggests war shrinks GDP, depresses consumption and investment, disrupts trade and fuels inflation — with no clear economic recovery even a decade later.
We then conducted further analysis and curated additional evidence so SustainCase readers have strong, credible data they can reference in conversations about conflict, risk and long-term value. What follows is a concise synthesis of the most powerful findings that sustainability professionals, investors and civic leaders can use to argue effectively against war-driven policy choices and to promote stability, resilience and transparent risk governance.
Economists show war isn’t just a moral tragedy — it’s a measurable economic crisis that knocks decades off growth.
War is often framed in political or military terms. The evidence shows it is equally an economic disaster. The onset of war leads to a sustained decline in real GDP of approximately 13 per cent. There is little sign of recovery even a decade later. Economies do not simply bounce back once fighting stops.
The damage reaches households directly. Consumption falls by around 11 per cent, meaning lower living standards and reduced access to goods and services. Investment drops by roughly 14 per cent as uncertainty deters both private capital and public infrastructure spending. Trade weakens sharply, with exports declining by about 13 per cent and imports by 7 per cent. Inflation pressures intensify, with price levels rising dramatically and remaining elevated for years.
Crucially, the research shows that all parties involved suffer long term economic harm. There are no true economic winners in war. Growth, trade, fiscal stability and institutional resilience are all weakened.
Key Evidence Points
- War reduces national GDP by around 13 per cent, with no meaningful recovery even a decade after conflict onset (Benmelech and Monteiro 2025, https://insight.kellogg.northwestern.edu/article/the-economic-price-we-pay-for-war)
- Household consumption falls by roughly 11 per cent, directly lowering living standards and economic opportunity (Benmelech and Monteiro 2025, https://insight.kellogg.northwestern.edu/article/the-economic-price-we-pay-for-war)
- Investment declines by about 14 per cent as uncertainty discourages private capital formation and public infrastructure spending (Benmelech and Monteiro 2025, https://insight.kellogg.northwestern.edu/article/the-economic-price-we-pay-for-war)
- Exports drop by around 13 per cent and imports by approximately 7 per cent, weakening trade integration and global supply chains (Benmelech and Monteiro 2025, https://insight.kellogg.northwestern.edu/article/the-economic-price-we-pay-for-war)
- Inflation rises sharply, with price levels increasing significantly and remaining elevated for years, eroding purchasing power and fiscal stability (Benmelech and Monteiro 2025, https://insight.kellogg.northwestern.edu/newsletters/the-economic-shocks-of-war)
- The broader macroeconomic impact is persistent across both winners and losers, with long term structural damage to growth, fiscal space and institutional resilience (Federle et al. 2025, European Central Bank Working Paper, https://www.ecb.europa.eu/press/conferences/shared/pdf/20251031_ECB_IMF/S4_paper1_Federle.pdf)
Sustaincase readers who live in democratic systems have another lever: direct engagement with elected representatives.
A short, structured letter can ask clear, measurable questions.
For example:
- What diplomatic initiatives is our government actively supporting to prevent escalation?
- How are conflict risks being assessed within national economic and fiscal planning?
- What safeguards exist to ensure parliamentary oversight of military commitments and defence spending?
- How is the government strengthening multilateral cooperation, trade stability and institutional resilience to reduce the likelihood of conflict?
- What independent economic impact assessments are conducted before major security decisions are taken?
SustainCase Readers – Evidence-Based Civic Engagement
Environmental protection, social prosperity and peace are interconnected public goods. Stability underpins sustainable development and long-term economic resilience. Informed civic participation helps strengthen accountability. Engage constructively with institutions, ask for transparency and evidence in decision-making, and support cooperation that promotes stability. Sustainable outcomes depend on active, informed citizens.
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References
Benmelech, E and Monteiro, J (2025) The Economic Price We Pay for War. Kellogg Insight. Available at: https://insight.kellogg.northwestern.edu/article/the-economic-price-we-pay-for-war (Accessed: 3 March 2026).
Benmelech, E and Monteiro, J (2025) The Economic Shocks of War. Kellogg Insight Newsletter. Available at: https://insight.kellogg.northwestern.edu/newsletters/the-economic-shocks-of-war (Accessed: 3 March 2026).
Federle, J, Meier, A, Müller, G et al. (2025) The Price of War. European Central Bank / Kiel Institute Working Paper. Available at: https://www.ecb.europa.eu/press/conferences/shared/pdf/20251031_ECB_IMF/S4_paper1_Federle.pdf(Accessed: 3 March 2026).
Watson Institute Costs of War Project (2025) Costs of War. Brown University. Available at: https://costsofwar.watson.brown.edu/costs/economic (Accessed: 3 March 2026).
Stiglitz, JE and Bilmes, L (2008) The Three Trillion Dollar War: The True Cost of the Iraq Conflict. New York: W.W. Norton & Company.