Nicely summarised - I agree that urban homesteading should be part of the future... anyone can grow plentiful greens with just a balcony!
There's also a few inspiring examples of roof gardens here in the UK - one in Reading I went to had over 100 varieties of plants.
Although personally I'm moving more rural. Want to upscale my growing.
That's awesome!
Despite all of their faults, I believe humans are still capable of using their technological brains for good.