Open Source & The Commons
The Accidental Operating System That Runs the World
The software powering most of the internet, nearly every Android phone, and the computers aboard the International Space Station was written, for free, by a Finnish graduate student who just wanted to tinker.
The Idea
In 1991, Linus Torvalds posted a message to a programming forum that began with almost comical understatement: 'I'm doing a (free) operating system (just a hobby, won't be big and professional like gnu).' What followed was Linux — and the hobby now underpins the infrastructure of the modern world. The genuinely surprising thing about Linux isn't that open-source software can be good. It's that a decentralised, volunteer-driven model produced something more reliable and more secure than almost anything built by well-funded corporations. The conventional logic of the 1990s said this shouldn't work: software is complex, coordination is expensive, and without financial incentive the best engineers walk. Linux broke all three assumptions. This happened because open source changes the economics of debugging. The programmer Eric Raymond captured it in what became known as Linus's Law: 'given enough eyeballs, all bugs are shallow.' When code is proprietary, only the company's own team can find flaws. When it's open, thousands of people can — and do — catch problems that no single team would. Transparency, counterintuitively, became a form of security rather than a vulnerability. What Torvalds created wasn't just a piece of software. It was a model: that a commons — a shared resource maintained collectively, governed by norms rather than ownership — could out-compete private alternatives at the highest levels of complexity.
In the World
By the mid-2000s, Microsoft had publicly called Linux 'a cancer' — intellectual property that would contaminate commercial software wherever it spread. It was an existential threat framing, and Microsoft meant it seriously. The company ran campaigns urging corporate customers to stick with Windows, warning of legal risks around open-source licensing. Fifteen years later, Microsoft acquired GitHub — the platform where most of the world's open-source code lives, including Linux's own development — for a sum equivalent to a small nation's annual budget. Then it open-sourced its own flagship code editor, VS Code, which promptly became the most widely used development tool on the planet. Then it built one of the most significant AI coding assistants in history on top of open-source models and Linux infrastructure. The reversal is almost Shakespearean. The company that once declared Linux cancerous now runs more Linux virtual machines on its Azure cloud platform than Windows ones. Its CEO, Satya Nadella, stood on stage in 2015 and simply said: 'Microsoft loves Linux.' The audience laughed, uncertain whether it was a joke. It wasn't. What changed wasn't Microsoft's values — it was their recognition that the commons had won. Fighting Linux was like fighting the tide. The smarter move was to build on top of it, contribute to it, and make money from the services layered above a foundation you don't have to own.
Why It Matters
The Linux story reframes a question most of us carry around without realising it: does something have to be owned to be well-maintained? We're trained to assume that private ownership is what gives people the incentive to build and sustain things of value. Linux is one of history's clearest counterexamples. A collectively held resource, governed by meritocratic norms and a culture of transparency, produced something more durable than almost any proprietary equivalent. This has implications beyond software. The same tension — commons versus enclosure, open versus proprietary — runs through debates about scientific publishing, genomic data, AI training sets, and even city infrastructure. Who owns the foundations that everyone builds on top of? Next time you use your phone, load a website, or stream a film, you're almost certainly running on Linux somewhere in the stack. That foundation was built by people who weren't paid to build it, maintained by people who often still aren't, and it has outlasted dozens of well-funded rivals. That fact alone is worth sitting with — because it suggests the logic of the commons is more powerful than we tend to give it credit for.
A Question to Ponder
What other things in your life depend on a commons — something collectively built and maintained that nobody owns — and what would actually happen if that commons disappeared?
Get a new one of these every morning.
Start learning with Thinkable