The Discoverers

Boorstin writes a history of discovery organised by what was discovered rather than by chronology or nation: time, the earth and the seas, nature, and society. He covers the invention of the calendar and the clock, the development of cartography and navigation, the voyages of exploration, the microscope and telescope, the classification of species, the discovery of geological time and evolution, and the emergence of history, economics and the social sciences.

His organising argument is that the main obstacle to discovery has been not ignorance but confident false knowledge. He returns repeatedly to cases where an existing authoritative framework prevented people from seeing what was in front of them: Ptolemaic geography, Galenic medicine, biblical chronology, the Chinese decision to end the Zheng He voyages, and the scholastic reliance on classical authority. His term for this is the illusion of knowledge, and he treats it as the recurring enemy of progress.

The book is a synthesis for general readers, wide-ranging and readable, and it works well as a source of specific historical cases about how frameworks blind people. Its weaknesses are those of the genre and the period. It is heavily Western in emphasis despite chapters on China and Islam, its treatment of non-European science is thin and sometimes dismissive, and specialists have noted numerous small errors. Boorstin was Librarian of Congress and wrote as a public historian rather than as a researcher of primary sources. The framing of discovery as heroic individual achievement has been substantially revised by later history of science.