In a Feb. 16 speech in Indonesia, Secretary of State John Kerry assailed climate-change skeptics as members of the "Flat Earth Society" for doubting the reality of catastrophic climate change. He said, "We should not allow a tiny minority of shoddy scientists" and "extreme ideologues to compete with scientific facts."

But who are the Flat Earthers, and who is ignoring the scientific facts? In ancient times, the notion of a flat Earth was the scientific consensus, and it was only a minority who...