Carl Sagan Was Really Bad at History

Carl Sagan’s thirteen-episode documentary series Cosmos: A Personal Voyage, which originally aired on PBS in 1980, is the most watched PBS documentary series in history. The miniseries, which is, broadly speaking, about the history and importance of science, has had a massive influence on both our culture as a whole and on individual people’s lives. Many people say that watching Cosmos growing up was what inspired them to go into STEM.

Unfortunately, while Carl Sagan may have been a brilliant scientist and a great science popularizer, he was an unbelievably terrible historian and, in the show, he gets a boatload of facts about history blatantly wrong. Because Sagan was a scientist with an established reputation, though, many people have assumed that everything he says in the miniseries must be correct and, as a result, these misconceptions have spread and become embedded in popular culture.

Perhaps the most influentially wrong segment in the whole series is a twenty-two-and-a-half-minute segment in the last episode about the destruction of the Great Library of Alexandria and the murder of the Neoplatonist philosopher Hypatia. In this one segment, Sagan manages to promote what seems like roughly half of all the misconceptions about the ancient world that I have ever debunked.

I wrote an article in August 2018 debunking misconceptions about Hypatia and another article in July 2019 debunking misconceptions about the Library of Alexandria. In both of those articles, I have noted that many of the misconceptions I debunk originated from Carl Sagan’s Cosmos, but, in those articles, I did not address Carl Sagan’s PBS miniseries directly.

I have therefore decided to undertake the ambitious task of going through the entire segment about Hypatia and the Library of Alexandria and correcting all the inaccuracies I come across. This should give you some impression of how historically accurate Carl Sagan’s documentary really is.

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If You Like Ancient Greek Texts, Thank the Byzantines for Preserving Them

There is a widespread belief among members of the general public that ancient Greek texts were mostly only preserved by the Arabs through Arabic translations. The Byzantine Empire is rarely mentioned in the context of the preservation of classical texts. When the Byzantines are mentioned in this context, it is usually by writers who see them as ignorant fundamentalist Christian obscurantists.

Contrary to what popular culture would lead you to believe, however, the Byzantine Empire did retain Greco-Roman knowledge. In fact, the vast majority of ancient Greek texts that have survived to the present day are primarily known from Greek manuscripts that were either copied in the Byzantine Empire or copied from texts that were copied in the Byzantine Empire.

The idea that the majority of ancient Greek texts have only been preserved because they were translated by Arabic scholars is largely a misconception. There are a few lesser-known classical Greek texts that have been preserved only through Arabic translations, but the vast majority of the really famous texts that people still study today have actually been preserved in the original Greek.

The widespread ignorance of the Byzantines’ role in the preservation of classical Greek and Roman texts is just one small part of a centuries-old, systematic effort by westerners to marginalize the Byzantine Empire and minimize its importance in European history.

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