The Information: A History, a Theory, a Flood

James Gleick’s central claim in The Information is audacious: information — not matter, not energy, not consciousness — is the fundamental organizing principle of the universe. From this launching point he constructs an intellectual history that sweeps from preliterate African cultures who encoded complex messages in drum rhythms, through the invention of writing and the printing press, to Charles Babbage’s mechanical computers, the telegraph, Claude Shannon’s 1948 mathematical theory of information, and the contemporary digital deluge. It is one of the most ambitious popular science books of the 21st century.

The book’s heart is its treatment of Claude Shannon, the Bell Labs mathematician whose 1948 paper “A Mathematical Theory of Communication” is arguably the founding document of the information age. Shannon showed that information could be quantified, measured in bits, and transmitted over noisy channels with calculable efficiency — and that this was true regardless of what the information meant. The separation of information from meaning was revolutionary and counterintuitive: a telegram conveying the death of a loved one and a telegram conveying tomorrow’s weather contain different amounts of information in Shannon’s sense, but meaning plays no role in the calculation. Gleick explains this with exceptional clarity, making Shannon’s ideas accessible without dumbing them down.

Surrounding Shannon’s central story are a series of brilliant intellectual portraits: Charles Babbage and Ada Lovelace pioneering mechanical computation a century before electronic computers; Samuel Morse reducing language to dots and dashes; the early lexicographers of the Oxford English Dictionary grappling with the infinite complexity of meaning in natural language; Richard Dawkins introducing the concept of the meme. Each chapter could stand alone as a piece of intellectual history, but Gleick weaves them together into a coherent argument that information has always been the medium through which minds shape reality.

The final section, dealing with the contemporary information flood — the internet, Wikipedia, genomics, quantum computing — is necessarily more speculative and somewhat less tightly organized than the historical chapters. But it raises genuinely important questions about what happens to human knowledge when the marginal cost of distributing information approaches zero. The Information is the kind of book that subtly changes how you see everything — the books on your shelf, the messages on your phone, the DNA in every cell of your body — all of it reconceived as information, endlessly copied, transmitted, and transformed.