When will the Mainstream Move?

Global sustainability will only happen if the mainstream of the population live lives that are sustainable.  That might seem like a trivial statement.  But it has some fundamental questions underneath it.  How and when will the mainstream accelerate the necessary shift from an unsustainable trajectory to a sustainable one?  

​The transition has started, but is not happening fast enough, as highlighted by Lord Stern in many talks and publications in the last few years, on the issue of Climate Change alone.
 
​And yet it goes much further than Climate Change.  It is an issue of water, food, land use, consumerism.  All these aspects require major shifts globally to achieve a just and sustainable future for all global citizens.
The mainstream is the place where this shift will really happen. 
​And if the mainstream doesn't "move" in the sense of changing its ways of living, travelling, earning, using energy, consuming, recycling, then the mainstream might have to "move" in a different sense - to physically move to find different places to sustain itself as increasingly dramatic deterioration happens in the places they currently live - resulting in mass migration on an unprecedented scale.