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Why do libraries preserve older information that may not be available through commercial databases?

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British Museum: Reading Room — library Reading Room of the British Museum, designed by Sidney Smirke in collaboration with Anthony Panizzi and built in the 1850s. Illustration by Smirke, from the *Illustrated London News*, 1857.

Libraries preserve older information that may not be available through commercial databases because they serve as the primary stewards of our intellectual and cultural heritage. While commercial entities often license information for specific, profit-driven uses, they do not always prioritize the long-term retention of older materials. Libraries, by contrast, maintain a fundamental commitment to ensuring that the records of a civilization—including historical, business, legal, and religious documents—are transmitted to future generations.12

This preservation is essential because much of the world’s great literature and historical record exists today only because libraries actively protected these materials from loss or physical decay. Many older documents, particularly those printed on acidic paper from the 19th and 20th centuries, are prone to disintegration; libraries utilize specialized strategies like reformatting—such as creating microfilm or digital images—to save this content from being lost to time. By maintaining these collections, libraries ensure that scholars and the public retain access to the foundational knowledge that commercial databases may overlook or fail to archive.1324