You will note in the table [2], that at the top are the oil producing countries in the Middle East, followed by Canada, USA, and Australia. Most of the large European countries are far below. The bottom half of the table obviously contains no West countries.
China has half the per capita emissions of USA/Canada/Australia, and the same as current Europe, and it's already decreasing both its population and soon its per capita emissions.
It's precisely the people in the Middle East and USA/Canada/Australia have to make the largest changes in their systems. China+Europe have to follow the same downward trajectories.
[1] https://ourworldindata.org/explorers/co2?tab=table&time=2011...
[2] Please ignore small countries, which have negligible total emissions.
It's not like we're going to give developing countries nuclear power so their choice is coal, natural gas, wind, and solar. And inevitably they follow that specific chain of energy build-out as their growing economy starts cleaning up. No one has demonstrated a high-scale success that is not that.