Country boundaries aren't arbitrary because they are where policies are made. If you could just pick the top 1-billion polluting individual humans in the world and focus on them, that would be ideal. But that obviously doesn't work. You have to operate on the level of political groups. Nation states are the most obvious groups because they can respond to geopolitical pressures.

Policies and social behaviors (enforced by nations or voluntary) are not. People cause the pollution we're talking about, so we have to deal with them as they are.

> What matters is the number of people multiplied by the amount they emit.

Pointing to per capita rather than aggregate is a deflection. Either the environment is in practical danger and we need to reduce total aggregate emissions, or we need to do that AND need to mildly reduce emissions through personal responsibility (virtue signaling) leading to "eventual good" by habit forming. Either way the aggregate matters most, per capita least.

I believe that the situation will come down to a trade war before a physical war, which still involves nations and absolute measures. Once those measures are involved, then per capita will become a factor internally (to the nations involved). Convince me otherwise. I will not reply, but I will read/listen. I'm genuinely interested in the train of thought that other people follow.