I don't know why you are bringing up GDP numbers when the UN's conservative estimate for climate refugees is 1 billion people, but fine lets go there. The polit

I don't know why you are bringing up GDP numbers when the UN's conservative estimate for climate refugees is 1 billion people, but fine lets go there. The political problems we are seeing today, the threats to democracy and instability are due to a slow down in growth (most places still growing). If you were to stop that growth, or even contract the world economy, the effect on our societies, political systems, etc. would be catastrophic. In short, everyone's economy is built on perpetual growth. If that growth stops or reverse, everything falls down. And you don't need to get to 2100 before civil society breaks down. So either you think none of the above will happen (and do explain why) or you do and you still don't think it warrants immediate and drastic action. Which also requires an explanation.