Executive summary: This accessible, exploratory explainer argues that while the Fearon (1995) bargaining model implies rational states should prefer negotiated deals to war, conflicts still arise due to private information, commitment problems, leader- and system-level irrationalities, and “unreasonable” preferences; modern trends (higher valuation of life, nuclear deterrence) make large interstate wars rarer but not impossible, so peace depends on better institutions, constraints on leaders, and value shifts rather than inevitability.
Key points:
Core puzzle and model: In rationalist bargaining, war is ex post inefficient and should be avoidable within a “bargaining range,” yet it persists—this is the puzzle the post introduces for non-specialists.
Fearon’s mechanisms: Two canonical failure modes break bargaining logic: (a) private information with incentives to misrepresent, which fuels bluffing and miscalculation; and (b) commitment problems, where shifting power makes credible long-term promises impossible.
Two added failure modes: (c) State irrationality—either genuinely irrational leaders or individually rational elites producing collectively irrational outcomes via domestic incentives; and (d) rational pursuit of unreasonable preferences (e.g., sacred values, honor, hatred, risk-seeking), where war is instrumentally or intrinsically valued.
Trends raising the cost of war: Societies’ rising value of statistical life and the catastrophic downside of nuclear weapons push actors toward negotiated outcomes or limited conflict, though these pressures are not uniform across regimes.
Mixed empirical picture: Long-run declines in interstate war deaths suggest progress, but power-law risks, statistical caveats, and cases like Russia–Ukraine indicate the “Long Peace” may be fragile rather than guaranteed.
Implications and directions: Reducing war entails verification and transparency to fix information problems, binding institutions to address commitment issues, checks on leaders’ incentives, and value change around sacred or honor-based aims; the author signals tentative optimism and openness to future posts on practical roadmaps.
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Executive summary: This accessible, exploratory explainer argues that while the Fearon (1995) bargaining model implies rational states should prefer negotiated deals to war, conflicts still arise due to private information, commitment problems, leader- and system-level irrationalities, and “unreasonable” preferences; modern trends (higher valuation of life, nuclear deterrence) make large interstate wars rarer but not impossible, so peace depends on better institutions, constraints on leaders, and value shifts rather than inevitability.
Key points:
Core puzzle and model: In rationalist bargaining, war is ex post inefficient and should be avoidable within a “bargaining range,” yet it persists—this is the puzzle the post introduces for non-specialists.
Fearon’s mechanisms: Two canonical failure modes break bargaining logic: (a) private information with incentives to misrepresent, which fuels bluffing and miscalculation; and (b) commitment problems, where shifting power makes credible long-term promises impossible.
Two added failure modes: (c) State irrationality—either genuinely irrational leaders or individually rational elites producing collectively irrational outcomes via domestic incentives; and (d) rational pursuit of unreasonable preferences (e.g., sacred values, honor, hatred, risk-seeking), where war is instrumentally or intrinsically valued.
Trends raising the cost of war: Societies’ rising value of statistical life and the catastrophic downside of nuclear weapons push actors toward negotiated outcomes or limited conflict, though these pressures are not uniform across regimes.
Mixed empirical picture: Long-run declines in interstate war deaths suggest progress, but power-law risks, statistical caveats, and cases like Russia–Ukraine indicate the “Long Peace” may be fragile rather than guaranteed.
Implications and directions: Reducing war entails verification and transparency to fix information problems, binding institutions to address commitment issues, checks on leaders’ incentives, and value change around sacred or honor-based aims; the author signals tentative optimism and openness to future posts on practical roadmaps.
This comment was auto-generated by the EA Forum Team. Feel free to point out issues with this summary by replying to the comment, and contact us if you have feedback.