Scott Alexander explores how perfect predictions of war outcomes, through oracles or prediction markets, could potentially prevent wars, and extends this concept to conflicts between superintelligent AIs. Longer summary

Scott Alexander explores the concept of using oracles or prediction markets to prevent wars. He begins with a hypothetical scenario where accurate predictions of war outcomes are available, discussing how this might affect decisions to go to war. He then considers the Mexican-American War as an example, proposing a thought experiment where both sides could avoid the war by negotiating based on the predicted outcome. The post then shifts to discussing the potential of prediction markets as a more realistic alternative to oracles, referencing Robin Hanson's concept of futarchy. Finally, Scott speculates on how superintelligent AIs might resolve conflicts, drawing parallels to the idea of using perfect predictions to avoid destructive wars. Shorter summary