The point is that capitalism just allows people to realise their preferences, and peoples' preferences as revealed by ther actions clearly show they don't reall

The point is that capitalism just allows people to realise their preferences, and peoples' preferences as revealed by ther actions clearly show they don't really care that much about preventing climate change. No economic system is going to change this, unless it prevents people from doing what they want (what they want is to enjoy a good standard of living, with pickup trucks, SUVs, regular flights, large beef hamburgers...).