Middle Powers Hold Hard Leverage Over Frontier AI Supply Chains

4. Influence doesn't need hard power. Only ~20% of ChatGPT users are in the US, so other markets do have influence – the Brussels Effect. Korea's biggest impact on frontier AI governance to date came not from its HBM leverage, but from convening the Seoul Summit. https://x.com/Manderljung/status/2075200163207893018/photo/1