Respectfully suggest this is nonsense. No serious climate scientist thinks we are going to fall off a cliff. There will be huge costs, yes. Civilization won't end, no. What people fail to grasp is that costs can be absolutely enormous but look like a blip compared to the effect of GDP growth in the long run. World War II is an example. The millions of deaths barely show up on a graph of world population. The huge los…
But the analogy, which is that we are headed for a disaster and at this point we must take rapid drastic action to avoid it, I think is correct. Rapid action means making decisions now to commit to decades of repair work. It means immediately stopping new climate bomb projects. On the scale of a society, change that takes decades is akin to swerving a bus. And if we take no action, I think the analogy of crashing in to a canyon is appropriately bad. The only difference is that falling off a cliff happens in an instant, and no harm is done if you stop at the last minute, whereas with climate change the problem is slowly getting worse day by day. So yeah, it is not a perfect analogy, but I don't think we are meant to take the cliff as a direct analogy to climate change occurring all at once or not at all. Doctorow certainly knows that is not physically correct.
Now if you look at human activity on long timescales, the decisions we make this century can drop us off a cliff in to disaster, or change our trajectory to just some bumps and bruises. And I think on this time scale the cliff analogy is more literal. You just can't think on the year by year timescales we normally think.