Tim Berners-Lee and the World Wide Web

Zusammenfassung

In 1989, a British physicist working at a particle physics laboratory in Switzerland submitted a proposal to his manager for a system to help researchers share information. His manager approved it with the handwritten annotation “Vague but exciting.” By Christmas 1990, the first working website existed. By April 1993, CERN had released the technology into the public domain — no patents, no royalties, for anyone, forever. Tim Berners-Lee had declined to become a billionaire in order to give the world the Web. He spent the following three decades watching what the world built with it and growing increasingly alarmed.

The CERN Problem

Timothy John Berners-Lee was born on June 8, 1955, in London. His parents were a matched pair of unusual distinction: Conway Berners-Lee and Mary Lee Woods had both worked on the Ferranti Mark 1, one of the first commercially sold computers, in the early 1950s. The dinner table, by his own account, was a place where mathematics and computing were the natural language of conversation. He studied physics at Queen’s College, Oxford, graduating in 1976, and spent his early career writing software for telecommunications companies.

In 1980, he joined CERN — the European Organization for Nuclear Research, the particle physics laboratory straddling the French-Swiss border near Geneva — as a consultant. The scale of the place was staggering. CERN employed thousands of researchers from dozens of countries. Accelerators three miles in circumference were supervised by shifting teams of physicists who arrived on two-year contracts, absorbed years of institutional knowledge, and left, taking that knowledge with them. Connecting a new researcher to the understanding of what existed and who knew what was a problem no filing system had solved.

Berners-Lee’s first attempt was personal. He wrote a program he called ENQUIRE — named after an old Victorian domestic encyclopedia he remembered from his parents’ bookshelf, Enquire Within Upon Everything. ENQUIRE organized information as a network of nodes connected by typed links: a person linked to the projects they worked on, which linked to the software those projects used, which linked to the computers that software ran on. It was a small hypertext system, running on one computer, with no external connections.

He left CERN in 1980, worked elsewhere for four years, and returned in 1984 as a permanent Fellow. ENQUIRE had been lost. But the problem it had tried to solve had only grown larger.

“Vague but Exciting”: The 1989 Proposal

In March 1989, Berners-Lee submitted a formal proposal to his manager, Mike Sendall, titled “Information Management: A Proposal.” The document described a global hypertext system in which documents on networked computers could contain clickable links to documents on any other networked computer. A physicist at CERN could write a document, embed in it a reference to another document held on a computer in another building or another country, and a reader clicking that reference would be taken directly to it.

Sendall returned the proposal with a note in the margin: “Vague but exciting.” He approved it.

The key conceptual moves in the proposal were three. First, hypertext — documents containing links to other documents — would provide the navigational structure. Vannevar Bush had theorized this in 1945, and Douglas Engelbart had demonstrated it in 1968, but both implementations required users to be inside a specific system. Berners-Lee proposed extending it across the open internet, which meant the links could connect documents on any computer anywhere.

Second, every document would have a unique, persistent address — a Uniform Resource Locator, or URL — that specified exactly where it lived on the network. This made linking reliable: you could write a link, share it with another person months later, and it would still point to the same thing.

Third, documents would be written in a simple markup language — HTML, HyperText Markup Language — that any software could parse and display. HTML was deliberately simple, even crude: it described structure (this is a heading, this is a paragraph, this is a link) rather than appearance, leaving rendering to the browser. A document that could be rendered by a simple program on any computer was a document that could reach everyone.

Info

Berners-Lee built on the internet infrastructure that already existed — the TCP/IP protocols that Cerf and Kahn had designed. He did not build a new network; he built an application layer on top of the existing one. HTTP (HyperText Transfer Protocol), the protocol browsers use to request web pages, runs over TCP/IP. The Web is not the internet; it is one of many applications that run on the internet. Berners-Lee’s contribution was the application layer that made the internet comprehensible and navigable for ordinary people.

In November 1990, Berners-Lee submitted a revised proposal with Belgian computer scientist Robert Cailliau. It included a full system architecture: a server program, a client program (the browser), the HTTP protocol, and HTML. The computing environment at CERN favored a specific machine: the NeXT workstation, manufactured by Steve Jobs’s company after his departure from Apple, running an object-oriented operating system that made software development unusually fast. Berners-Lee wrote the first web server and the first web browser — called WorldWideWeb — on a NeXT.

On Christmas Day, 1990, the first successful HTTP communication occurred between his NeXT workstation acting as server and a client browser he had written. The server had a handwritten label taped to it: “This machine is a server. DO NOT POWER IT DOWN!!”

The First Website

The first website was info.cern.ch. It described the World Wide Web project itself. On August 6, 1991, Berners-Lee posted to the alt.hypertext Usenet newsgroup announcing that the software — server and browser — was publicly available for download. Anyone could run a website.

Adoption was slow at first. The line-mode browser that most people could access displayed web pages as plain text, with links indicated only by numbers in brackets. A physics lab in Sweden put up a website. A few universities followed. By the end of 1991, there were perhaps a dozen websites in the world.

The inflection point came with Mosaic — the graphical browser written by Marc Andreessen at the University of Illinois in early 1993. Mosaic displayed images inline with text, used a point-and-click interface, and ran on the Windows computers that most people actually owned. Within months of Mosaic’s release, the web was growing at a rate of several hundred percent per year.

The Public Domain Decision

As the web’s growth became visible, CERN faced a decision. The technology Berners-Lee had developed on company time, using company resources, was clearly valuable. The institution could patent HTTP, HTML, and the URL format — could charge licensing fees for every website, every browser, every server. The revenue would be substantial.

Berners-Lee argued forcefully against it. The web’s value came entirely from its universality: it was useful because everyone could use it and everyone could build on it. A licensed web would fragment into competing proprietary systems, each incompatible with the others — exactly the fate that had befallen earlier attempts at distributed information systems. The royalties that would be earned in the short term would be dwarfed by the value destroyed in the long term.

On April 30, 1993, CERN officially released all World Wide Web technology into the public domain. No patents. No royalties. No restrictions. Anyone could implement HTML, HTTP, or URL handling without asking permission or paying fees.

Berners-Lee had given away what might have been the most valuable patent portfolio in history. He later said he had no regrets.

In October 1994, he founded the World Wide Web Consortium (W3C) at MIT, with funding from DARPA and the European Commission, to develop and maintain open web standards. The W3C’s model — consensus-based standardization, with participation from companies and institutions but no single controlling party — has governed the evolution of HTML, CSS, JavaScript APIs, and the web platform ever since. Berners-Lee served as director of the W3C until 2018, an unusually long institutional tenure that gave him unusual influence over the web’s technical direction.

Dead End: The Semantic Web

Berners-Lee’s technical ambitions for the web extended far beyond documents and links. In a 1999 book and a famous 2001 Scientific American article, he described a vision he called the Semantic Web: a next-generation web in which data would carry machine-readable meaning, expressed using formal vocabularies so that software agents could reason about it autonomously. A travel agent program could query multiple flight databases, hotel systems, and review sites, combining information from sources that had never been explicitly connected, because all the data would be expressed in interoperable formats.

The Semantic Web proposed a technical stack: RDF (Resource Description Framework) for expressing data relationships, OWL (Web Ontology Language) for defining shared vocabularies, and SPARQL for querying RDF stores. W3C standardized all of these. Academic researchers published thousands of papers. Funding agencies invested.

Warnung

The Semantic Web failed to achieve mainstream adoption for interlocking technical and economic reasons. Producing correct semantic markup required sustained expert effort. Individual websites had no incentive to annotate their data for competitors’ benefit — a company that carefully structured its product data in RDF would be making it easier for comparison engines to extract that data and direct customers to cheaper alternatives. The ontology standards were complex enough that only specialists could use them correctly, and specialists who disagreed about ontology design fought prolonged technical battles. Meanwhile, the practical problems the Semantic Web was meant to solve — cross-source information integration — were being addressed more cheaply by statistical machine learning and search engines that inferred structure without requiring it to be explicitly declared. What did succeed was a minimal subset: schema.org (2011), launched by Google, Bing, and Yahoo, provided a simplified vocabulary for structured data embeddable in ordinary HTML. This was far less ambitious than Berners-Lee’s vision, but it was what the market found tractable.

The Web He Didn’t Build

By the 2010s, Berners-Lee had become one of the most prominent critics of what the web had become. The open, decentralized network he had envisioned — where anyone could publish, anyone could link, no organization controlled access to information — had been substantially colonized by a handful of platforms. Facebook, Google, and Amazon mediated the experience of most web users. Their systems were designed to maximize engagement and data collection, not to serve user interests. The personal data generated by billions of people had become the raw material for surveillance capitalism on a scale that made earlier forms of commercial data collection look artisanal.

His responses were institutional and technical. In November 2018, he launched the “Contract for the Web” — a document articulating principles for governments, companies, and citizens about protecting the open web. Over 150 organizations signed. The contract had no enforcement mechanism; it was a statement of values.

More technically ambitious was the Solid project: an open-source platform Berners-Lee developed through his spinout company Inrupt, allowing individuals to store their personal data in “pods” — personal online data stores that they controlled — and grant specific applications permission to access specific data. Rather than surrendering all data to a platform in exchange for services, a Solid user would retain their data and extend fine-grained permission to applications that needed it. Berners-Lee described Solid as the web he had originally meant to build.

Solid remained a research and early-adopter project through the mid-2020s. Its adoption was limited by the familiar bootstrapping problem: the value of a data infrastructure depends on how many services use it, and services won’t invest in supporting an infrastructure that isn’t widely adopted.

Recognition

Berners-Lee was appointed Knight Commander of the Order of the British Empire (KBE) in 2004 — making him Sir Tim — in recognition of services to the global development of the internet. He received the Turing Award in 2016, the first time the award had been given solely for the invention of the World Wide Web. The citation noted that his invention had “fundamentally changed the way people communicate and share information.”

At the opening ceremony of the 2012 London Olympics, in front of 80,000 spectators and a global television audience, Berners-Lee sat at a NeXT workstation and typed a message that scrolled in lights across the stadium: “This is for everyone.”

He had said the same thing with CERN’s public domain decision in 1993. The 2012 display made it visible to billions of people at once.

The browsers that brought his invention to mass audiences are covered in Marc Andreessen and Netscape and Mitchell Baker and Mozilla; the Browser Wars in The Browser Wars; the network infrastructure the Web runs on in The Connected World.