@neauoire as with many other things, I think the biggest impact would come from decisions made by governments and (sigh)corporations, that would "set the trend", the masses would follow that trend, change would happen.
And again, as with many other things, we(as in not-governments and not-corporation) can only make a small impact if compared to them, but it's our only choice. And I think the more our effort goes toward "trendsetting", the better.