This does not mean rapid change will occur in our economy, however. No one stood to make trillions exploiting and repressing gay rights. Once opinions shift, policy can quickly follow. This is not true for the economy. Every single human being whose livelihood depends on fossil fuel consumption will fight to the death to preserve the status quo.
There are all sorts of barriers to action.
Right now we're still fighting the "is it happening" battle, closely followed by the "how bad it is and how much time do we have" one (as if we ought to dally another decade or two if we think we can - but I guess our parents generation did it in the 70s).
Trouble is - getting the idea out there to get enough people to agree that it is happening and that it needs to be addressed quickly is still only a first and early step.
Then you need to get into the details of solutions, and here lies another major argument - people who think the all powerful market will correct it all, people who think little incremental changes will be enough, those who are unprepared to let go of their energy hungry lifestyles, those who demand other people sacrifices first (think US vs China and the propaganda around China overtaking the US for absolute emissions).
Worse - such discussions and processes must happen in the vast majority of the earths population, split as it is into different nations, religions, histories, starting positions, etc.
Considering it has taken as long as it has to start to become optimistic that the first step can be surmounted
soon (probably with an empirical demonstration of collapse imminence), do we seriously think there will be much progress in all the other steps needed?
It is not just opposition to changing the status quo that is the issue - but also the confusion and lack of consensus on next steps. We see this in the vague pledges of various governments making promises on behalf of future people - "we'll cut 20% in 20 years" - nice soundbite, but you should cut the first % in the first damn year if so... (and it would still fall far short of requirements).