- Europe has under-invested in its military for 30 years.
- Japan by constitutional decree.
- South Korea is rapidly building out an armaments industry, but they're also still at war.
- The UK is gutted and unable to afford much of anything.
- India and Pakistan are laser focused on each other.
If China or Russia feel in an expansionist mood, who other than the US has the capability to stop them?
Historical echoes of the above dynamic are why Americans bristle at criticism of their military spending.
Sure, everyone's a pacifist until someone invades...