A lot of Pacific island nations are sinking below sea level; they could easily transition slowly into becoming floating nations.

We're going to draw a new map of the world, with French Polynesia as the centre of the Aquatic Age.

The first seastead happened fifteen centuries ago. The result was the most beautiful city in the world, Venice. People who were sick of their violent governments fled to the water, where they built civilization on stilts. That startup society - a free city-state on the water - became so successful it dominated the Mediterranean for a thousand years.

Seasteads are a technology for anybody to form an alternative community based on their unique values - for communities to organize themselves however they want. Seasteads are their chance to demonstrate their vision can work. All that matters is that people can create, join, and leave seasteads voluntarily. As long as people can choose among seasteads, the best ways of living together will prosper, and the ones that people don't like will fail.

Seasteads are man-made islands that float permanently on the ocean with any measure of a political autonomy. They would essentially be startup societies where people could form whatever kind of community they wanted.

Seasteading could be the means by which humanity will live sustainably.

Oil platforms are a technology for floating permanently on the high seas, and cruise ships are a technology for self-governance on the high seas, and if you combine these two technologies, imagine cruise ships that never dock but float permanently. Imagine if they were 10 times as big. Imagine if they were modular and could move about and you could choose the neighbours you wanted to live with.