There are three principles: The first is that we should have everything that Congress needs to do its work. The second is that we should possess the materials that cover the life and achievement of the United States. And the third is that we’re not in a vacuum, and we need stuff from the rest of the world.
How Does the World’s Largest Library Decide What Becomes History?
From ancient clay tablets to TV shows to video games, the U.S. Library of Congress preserves far more than just books
scientificamerican.com