I am writing this from Jeju.

The island is 1,849 square kilometres. The population is approximately 700,000. Every year, somewhere between 14 and 15 million people visit. The haenyeo — the women divers who have been harvesting the sea here for two millennia, holding their breath to depths of twenty metres and surfacing with abalone, sea cucumbers, and urchin — have an average age of 68. Their tradition is a UNESCO Intangible Cultural Heritage. The last generation is in the water. There is no next generation waiting to replace them.

This is one Jeju.

There is another.

In June 2009, the Korean government chose Jeju as the site for its national smart grid test bed. The stated reason was specific: the island offered availability of renewable energy sources and — critically — the requirement for a closed territory. An island is a closed system. The grid cannot leak into the mainland. The experiment stays contained. What happens on Jeju stays on Jeju until it is ready to scale.

168 companies participated. 64.5 billion KRW invested. 6,000 households enrolled. Five test areas: smart power grids, smart places, smart transportation, renewable energy, and electric services. The goal: the world’s first all-inclusive smart grid community. The ambition: to transform Jeju into the world’s largest smart grid test community — and from there, to export the model to Korea and the world.

That was the smart grid. It was only the beginning.

Jeju is now Korea’s designated test bed for autonomous vehicles — local startup RideFlux and SoCar are running self-driving shuttle pilots on the island’s smart road infrastructure. It is Korea’s first drone regulatory sandbox province, running for two consecutive years. In 2020, it launched the world’s first public mask delivery service for island communities using hydrogen drones. Its Smart City Plan 2023–2027 covers the entire administrative territory — all 1,850 square kilometres. The target: 100% renewable energy by 2030. Gapa Island, a small island south of Jeju with a population of around 200, is already there — a test within a test, the world’s first carbon-free island community.

And then there is the governance.

Jeju is a Special Self-Governing Province — a legal designation that has resulted in the transfer of 4,660 types of authority from the central government in Seoul to Jeju’s local government. Self-legislative power. Self-governing administration. Rights of self-organizing and personnel administration. Financial autonomy. An autonomous police system. An educational autonomy system. The Special Self-Governing Province framework is an experiment in decentralization: how much authority can be transferred to a sub-national unit before it starts to function like something else entirely?

Now consider the historical fact.

Tamna Kingdom existed as an independent island state from approximately the 1st century BCE until 938 CE, when it was incorporated into the Goryeo Dynasty as a tributary state, maintaining a degree of autonomy until 1105 when it became a formal Goryeo county. For more than a thousand years before that, Tamna governed itself, maintained its own maritime trade routes, developed its own culture and language (traces of which persist in Jeju dialect today), and functioned as what we would now call a city-state.

The city-state disappeared from history not because the concept was wrong but because nation-states were better at the things that mattered at the time: military defence, resource accumulation, and the economies of scale that large territories provided. Small island kingdoms could not compete.

Technology changes the calculation.

If a territory of 700,000 people can generate 100% of its energy from wind and solar, it no longer depends on mainland energy supply chains. If it has autonomous vehicle infrastructure, drone delivery, and smart grid management, it no longer needs the scale of a mainland logistics network. If it has digital governance, self-legislative power, and a transferred bureaucratic authority, it has the institutional capacity to govern itself. And if — like Tallinn’s Estonia — it can establish a digital residency programme that connects it economically to a global population far beyond its physical shores, it has the economic base that medieval Tamna maintained through maritime trade, rebuilt for the twenty-first century.

The Korean government chose Jeju as a test bed because it is a closed territory.

Tamna was a kingdom because it was a closed territory.

The island that was chosen for the experiment is the same island that already ran it, for a thousand years, before the experiment had a name.

(Sources: UPI / Wikipedia — Jeju Smart Grid Demonstration Project / Smart City Korea / Jeju Special Self-Governing Province / 100-Percent.org / Korea JoongAng Daily — 2019–2026)

Tallinn 🇪🇪 — Tier 1 · The Digital Nation-State. Population 1.3 Million. The Governance Model Jeju Should Be Studying.

Estonia has a population of 1.3 million — slightly smaller than Jeju’s resident population plus its annual visitor flow, larger than its permanent residents alone. What Estonia has done with that population is the most direct available model for what Tamna 2.0 could look like. E-residency gives more than 100,000 digital citizens from 170 countries legal and economic participation in Estonia’s institutional infrastructure without physical presence. Digital identity, blockchain-secured government records, online voting, and a bureaucracy that has been systematically moved to digital-first delivery have made Estonia’s governance more efficient per capita than almost any nation-state on earth. The specific question Tallinn raises for Jeju is not technological — Jeju has the technology. It is institutional: who has the authority to offer a Jeju digital residency? Under the current Special Self-Governing Province framework, Jeju has significant autonomy. Whether it has enough to create the legal infrastructure of a digital citizenry is the question that requires a political decision Seoul has not yet been asked to make.

Singapore 🇸🇬 — Tier 1 · The City-State That Became a First-World Nation in One Generation. The Warning and the Template.

Singapore was a city of 1.6 million people when it separated from Malaysia in 1965 — involuntarily, reluctantly, with Lee Kuan Yew’s reported tears at the press conference announcing separation. It had no natural resources, no hinterland, no strategic depth. In sixty years, it became one of the wealthiest and most institutionally sophisticated jurisdictions on earth. The Singapore model for Jeju is both inspiring and cautionary. Inspiring because Singapore proved that a small island territory, if it invests systematically in governance quality, education, infrastructure, and international connectivity, can outcompete nation-states many times its size. Cautionary because Singapore’s success required a specific kind of political will — the willingness to make decisions that are correct in the long term and unpopular in the short term — that democratic island governance has historically found difficult to sustain. Jeju’s Special Self-Governing Province framework gives it more democratic accountability than Singapore’s early years permitted. Whether democratic accountability and the speed of institutional development Singapore demonstrated can coexist is Jeju’s governing question.

Shenzhen 🇨🇳 — Tier 3 · The Test City That Became the Real Thing. The Most Important Urban Precedent for What Jeju Is Running.

Shenzhen was a fishing village of 30,000 people when Deng Xiaoping designated it as China’s first Special Economic Zone in 1980. The designation gave Shenzhen the authority to experiment with market economics, foreign investment, and governance models that were not available to the rest of China. It was, explicitly, a test bed: try it here, see what works, scale what succeeds. Shenzhen is now a city of 18 million and the headquarters of Huawei, Tencent, DJI, and BYD. The Shenzhen precedent for Jeju is not about scale — Jeju is unlikely to become an 18-million-person city. It is about the mechanism: the test bed that is given enough autonomy, enough time, and enough institutional support eventually stops being a test bed and starts being the model. Jeju has been a test bed for smart grids, autonomous vehicles, drone delivery, and renewable energy for more than fifteen years. The test has been running long enough to produce results. The question is whether the results get institutionalized into a new kind of jurisdiction — or whether they get exported to the mainland and Jeju returns to being a tourist island.