It’s not in my head. Going back as far as 1992 George Bush was saying “The American lifestyle is non-negotiable” at an international gathering focused on climate change.
This has proven true. It’s also spread across the globe and is a major contributor to green house gas emissions.
I wasn’t clear, even if American middle class would make a change, by that time, developing countries would be at the stage where they could and would have our luxury lifestyle. And that population outside US/EU is much much larger.