Here’s a notion that Wallace-Wells forwards in his book and to people who ask him about “hope” in the face of his “bleak picture”, which I think paints a false picture:

“No matter how out-of-control the climate system seems—with its roiling typhoons, unprecedented famines and heat waves, refugee crises and climate conflicts—we are all its authors. And still writing.”

Wallace-Wells, David. The Uninhabitable Earth (p. 30). Crown/Archetype. Kindle Edition.

There is this problem of “baked in” consequences. That what we have ALREADY done and can’t UNDO, and that those things take as much as a decade or two to bubble their way through the system before they manifest their consequences to us. What most Climate Scientists tell us, is that what we are striving to do is MINIMIZE the worst consequences, and that we are too late to avoid many, many very unfortunate things.

In other words,  there are many “ships”  that have “already sailed”.