The common claim that Columbus proved that the earth was round is the zombie myth from hell. It refuses to die. Every year students arrive in my intro class having been taught that people in the Middle Ages believed the earth was flat and that Columbus proved them wrong. This past semester, every student believed this to be true (see my post on the “Biography of a Map”).
Recently President Obama claimed that if opponents of alternative energy had lived during Columbus’s time they would not have believed that the earth was round and that they would have been founding members of the Flat Earth Society. There are two problems with this claim. First, Columbus and his contemporaries did not believe the earth was flat. Second, the Flat Earth Society was not founded until the late 19th century (if you can believe the website). See his comments at 1:05–1:10 on this video. It is appalling that President Obama would repeat this “Columbus proved the earth was round” myth.
Interestingly, only a few places have called President Obama on his error. TPM points out his mistakes in “Obama Mangles U.S., World History in Energy Speech. Strangely, they cite Stephen Jay Gould’s book Dinosaur In a Haystack (1995) rather than readily accessible articles that confront this myth. By citing Gould’s book, they fail to understand how this Columbus myth was the creation of 19th-century Protestants who wanted to portray the Catholic Middle Ages as anti-intellectual. The Columbus myth does work for these anti-Catholic and later anti-religion polemicists. Two readable articles are J. Russel’s “Inventing the Flat Earth” in History Today 41 (1991) and L. Cormack’s “That Medieval Christians Taught that the Earth Was Flat” in Galileo Goes to Jail and Other Myths about Science and Religion (Cambridge: HUP, 2009), 28–34.