THE LIGHT AGES

A broadcaster, historian, and lecturer at Cambridge, Falk reminds us that scholars no longer consider the centuries after the fall of Rome as the Dark Ages. Rather, “the medieval reality…is a Light Age of scientific interest and inquiry.” The author concentrates on Europe, where literacy was a church monopoly largely confined to monasteries. The greatest of these were wealthy institutions with branches, libraries, and schools whose scholars took part in an international community, which also included Muslims and Jews. Eschewing historical superstars—Roger Bacon makes a few appearances—Falk builds a story around John Westwyk, an obscure 14th-century monk who composed (or most likely copied) manuscripts on astronomical instruments, designed and built others, and traveled widely, making observations along the way. The author makes a convincing case that medieval times produced major advances in technology, mathematics, and education as well as some correct but many more fanciful explanations of natural phenomenon. Important inventions included spectacles, the compass, and Arabic numerals, but almost all of what passed for research confined itself to a single field: astronomy, which had always included astrology and would do so well into the Enlightenment. Fascinated by the heavens, medieval researchers produced precise descriptions of its movements and detected the minuscule variations in the earthly day and year. Much of this was in the service of astrology and the timing of holy days, but it had genuinely practical use in the creation of calendars. Although lacking telescopes, they designed exquisitely complex clocks and astronomical instruments—astrolabes, armillary spheres, equatoriums—that were both impressively accurate and works of art. Falk excels at bringing alive the personalities, theological doctrines, cosmology, and often cutthroat monastery politics of the era, but most readers will prefer to skim the lengthy descriptions of the construction and operation of medieval astronomical devices.

An impressive chronicle of human progress.