There is simply no way developed nations are going to curb their emissions enough in time, and that developing nations will refrain from increasing their emissions, for us to avoid this disaster.
We might as well get used to the idea that our civilization is going to collapse before too long, and there's really nothing we can do about it. Other civilizations in the past collapsed and disappeared because of environmental change, and ours will be no different.
Our globe-spanning communications seems like it should help us solve these problems together, but instead look what it's brought us: anti-vaxers convincing a lot of people not to vaccinate, which has now brought back diseases we thought were almost extinct. Instead of using these communications to convince people about real problems and solve them, these communications have instead enabled the stupidest people to have a much larger voice and influence, which has led us to disaster politically in the US for one (just look at who we elected in 2016).
Sorry, but I don't see how there's any way out of this mess. We can't just figure things out in 50 years and then start fixing the problem; by then it'll be far too late.
We're not going to solve climate change by democracies adopting high carbon taxes.