Next 20 years you are looking at shifting the economy to a war time footing to deal with climate change. State Socialism is a outcome, horrific fascism another. I don't think the is a role for liberal democracy for the next few generations. Currently we have non of the technology infrastructure for a tech utopia. Green solutions do not scale to human social levels, ecological political views are not likely to have a good "social" affect on the mega city's.
Its a part of the #OMNbbbbbbbb