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ONE's report analyzes security expenditures of the top 10 OECD countries between 2015 and 2024, finding a growing reliance on hard power. For each dollar invested in development cooperation, these countries spend seven dollars on military capabilities.

Military spending increased by nearly 30% from $1.14 trillion in 2015 to $1.45 trillion in 2024, while development assistance has stagnated or declined relative to economic strength. This imbalance undermines security claims and has geopolitical consequences, as seen in China's and Russia's expanding influence through simultaneous investment in defense, development, and diplomacy. ONE calls for OECD countries to invest in interconnected security.