FWIW, the middle class of Africa is larger than the middle class of North America.
https://qz.com/africa/1486764/how-big-is-africas-middle-clas...
(I don't know what that means, it's just a fact I picked up along the way. Like how more people know English in China than in North America. Just one of those weird thoughts that seems obvious in hindsight. https://en.wikipedia.org/wiki/English_education_in_China )
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> economic justice has to come first
Ecologically harmonious living is economical as well: your expenses are reduced, your health is improved, etc. In other words, ecologically harmonious living is economic justice. That's what that looks like in the real world: abundant (cheap) food, medicine, clothing, housing, etc.
The only downside to living in harmony with nature is for people who are committed to making money from waste (in the ultimate analysis.) E.g. GMO's are touted as solving world hunger, but really in practice they are used to lock-in corporate profits. The same company that sells you the poison sells you the seeds that resist the poison, seeds that you must buy each year: the contract states you can't save your own seed.
If you grow food in harmony with nature you don't need fertilizer ($$$) pesticide ($$$) GMO patented crop species ($$$) etc...
It's more profitable for the farmer and the product is healthier (reducing medical expenses, eh?)
Compare with, e.g.: Grow BIOINTENSIVE ( http://growbiointensive.org/ ) a system that uses around 5000f² (~450m²) per adult, produces a balanced complete diet, and increases soil volume and fertility year-on-year, while requiring no external inputs and little labor.
I have lots of other examples, poke me for more...
Anyway, the point is, "economic justice" is living in harmony with nature: they are the same thing.