That's true. There are so many facets that interact, aren't there?
While my main goal is to reach more privileged people and help them understand how to reduce their impact and better support those in need, I think many of the ideas I describe would also be applicable for a lower class person looking to achieve stability in their life.
I would also advocate for things like Kiva/Zidisha/GiveDirectly, where our money can help people in poorer countries set up businesses and get some sustainable income.
I think because of my own trajectory of being financially comfortable most of my life and then intentionally becoming poorer, it's easier for me to speak to that experience than it is for me to understand what changes a person who grew up in poverty needs to make in order to change their position from within. I trust that there are many other authors who could do a more authentic and competent job of that. I also think rich people are the ones who control the money and the power and they are the ones who need to make the greatest change, whereas those in poverty are already doing the best they can to survive.
Honestly, I think the rich could learn a lot from the poor.
I definitely plan to talk about fundamentalist religion as that is one area where I have direct experience and I can understand the impact it has. I should expand that to include all the other aspects you mentioned. One of the ideas I have is that when we reduce our cost of living, we free up more time and/or money to devote to the causes we are most passionate about as individuals.