Seasteading
Seasteading is the idea of building permanently inhabited platforms or floating settlements on the open sea, outside the control of existing states. The movement is heavily funded by Silicon Valley entrepreneurs, but has so far produced almost no inhabited facilities.
Seasteading refers to the plan of having people permanently live on floating structures at sea. The word combines the English “sea” with “homesteading,” meaning the settling of uninhabited land. What is meant are platforms, converted ships, or connected modules located far enough from the coast. For its supporters, the real appeal lies not in the technology but in the rules: on the high seas, no national law applies as it does on land. Anyone settling there could theoretically set their own laws, taxes, and currencies. So far, however, not a single permanently inhabited settlement of this kind exists.
The dream of a state on demand
Behind seasteading lies a political idea, not merely a construction concept. Its proponents see states as a kind of service provider that one should be able to switch like a mobile phone carrier. On land this is difficult: emigrating is costly, and new states practically never come into being. At sea, according to this vision, there would be room for hundreds of small communities trying out different systems of rules. Anyone who doesn’t like a settlement simply moves on with their module.
This vision explains why the topic regularly appears in tech and finance news. It is funded primarily by investors from Silicon Valley. The best known is Peter Thiel, co-founder of the payment service PayPal, who supported the Seasteading Institute with millions of dollars starting in 2008. The idea is also popular in the crypto scene, since digital currencies are meant to function without a state central bank.
Critics see the whole thing as an escape from responsibility. Those who are very wealthy could evade taxes and rules while the costs to society remain on land. Others point out that a small settlement without military and without alliances would be completely defenseless. Neither objection has been convincingly answered to this day.
Concrete, waves, and the question of sovereign territory
Technically, seasteading takes its cues from oil rigs and large cruise ships. Such structures have existed for decades, so they fundamentally work. The difference lies in the duration and the costs. An oil rig brings in oil that pays for its operation. A residential settlement at sea, by contrast, must finance its upkeep from the contributions of its residents.
Saltwater is the biggest enemy. It corrodes metal, and storms place permanent strain on the mooring. That’s why most designs plan for sheltered locations in shallow water, for instance off islands, rather than the true high seas. Electricity is meant to come from sun and wind, drinking water from desalination plants. This significantly raises the cost per resident above the level of a normal home on land.
The legal side is even more difficult than the structural one. Every state controls a zone of twelve nautical miles off its coast and claims economic rights up to 200 nautical miles. Only beyond that does the actual high seas begin. But there, the rule is: every floating object needs a flag, that is, a state responsible for it. This is precisely what negates the hoped-for independence.
Between announcements and the platform off Phuket
In the news, seasteading usually appears in the form of renderings, meaning computer-generated images of planned facilities. These images show hexagonal platforms with palm trees and glass façades. Almost nothing of this has actually been built. An agreement with French Polynesia over a test settlement fell through in 2018 due to local political opposition.
One case became known worldwide. In 2019, a couple erected a small residential platform off the Thai island of Phuket. Thailand viewed this as an attack on its sovereignty and investigated the pair. The structure was removed, and the couple left the country. The case has since been regarded as an example of how quickly states react.
Related, but not identical, are floating city districts designed to counter rising sea levels. In South Korea, such a project is being built off Busan with support from the United Nations. It is explicitly part of the city and falls under Korean law. This is exactly where the difference lies: these structures aim to create living space, whereas seasteading aims for political independence.