Is there any reason to be optimistic about our ability to deal with climate change? I have to admit that this topic depresses me deeply, as the United States' tepid response does not match the magnitude of the problem. It is shockingly easy to imagine scenarios resulting in the collapse of civilization (agricultural collapse places significant pressure on a few areas which leads to a domino effect of instability trig…
Yes: because failing to be optimistic about it will become a self-fulfilling prophecy.
Also, you never know what will make people come around. In any process of winning hearts and minds there is always a time before which things seem hopeless. Look at the Sanders and Trump campaigns: when they started, no one believed they could succeed. Bernie came very close, and Trump actually won. (Not that I want to hold up Trump as a model of how to proceed, but just as a data point to show that the unexpected can happen.) Maybe if we get enough "thousand year floods" like just happened in Maryland -- say a dozen of those events in a year or in a month -- people will suddenly wake up and realize the gravity of the situation and find their sense of duty and planetary patriotism.
You also never know what's coming down the technology pipe. This, for example, looks promising: http://phys.org/news/2016-07-breakthrough-solar-cell-capture...
We can still fix this. Don't lose hope.