I don’t often write blog articles with the sole purpose of commenting on news items, but as a decision today by President Donald Trump deeply implicates climate change–without a doubt the most serious problem facing every American and every person on earth right now–I felt I couldn’t let it go by without at least a few words. My academic expertise is in the history of climate change, I’ve taught courses on the history of climate change (and wrote about them, here and here), and most post-academic career involves climate change, so I believe I’m qualified to speak on the subject.

Trump’s decision to abrogate the Paris climate change accord, at least where the United States is concerned, is not merely a strategic misstep (though it is), a betrayal of American trust and power…