What Would Carl Sagan Say About Today's World?
Carl Sagan died in December 1996. He never saw a smartphone. He never saw social media. He never saw a large language model generate a confident lie on demand. He never saw a calendar year pass 1.5 degrees Celsius of warming above the pre-industrial level, because that year, 2024, was still twenty-eight years away. And yet the question of what he would say about today’s world is not idle curiosity. It is a way of asking what the evidence demands of us, and he spent his life teaching us how to ask exactly that question. He would recognize this moment. He spent thirty years warning that it was coming. The most useful thing we can do is listen to what he said, because he said it all before, and he said it with the evidence in his hand. ...