Put it this way: Republicans can’t seem to repeal Obamacare, and recriminations between Senate leaders and the tweeter in chief are making headlines. But the G.O.P. is completely united behind its project of destroying civilization, and it’s making good progress toward that goal.

So where does climate denial come from?

Just to be clear, experts aren’t always right; even an overwhelming scientific consensus sometimes turns out to have been wrong. And if someone offers a good-faith critique of conventional views, a serious effort to get at the truth, he or she deserves a hearing.

What becomes clear to anyone following the climate debate, however, is that hardly any climate skeptics are in fact trying to get at the truth. I’m not a climate scientist, but I do know what bogus arguments look like — and I can’t think of a single prominent climate skeptic who isn’t obviously arguing in bad faith.

Take, for example, all the people who seized on the fact that 1998 was an unusually warm year to claim that global warming stopped 20 years ago — as if one unseasonably hot day in May proves that summer is a myth. Or all the people who cited out-of-context quotes from climate researchers as evidence of a vast scientific conspiracy.

Or for that matter, think of anyone who cites “uncertainty” as a reason to do nothing — when it should be obvious that the risks of faster-than-expected climate change if we do too little dwarf the risks of doing too much if change is slower than expected.