After the precariat, the unnecessariat: the humans who are superfluous to corporations

I think a big thing in the future will be local availability of food/potable water etc…

Soy is a good option: it can be made into just about anything.
Really, I think people will have to live far, far more efficiently than they have been.
And one of the first steps there is getting out of the house/apartment and making contact with our neighbors.