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

I think our children will be living on floating cities, and they will look back on the 20th Century, when people lived in primitive governments founded in previous centuries, and they will be living on modular, sustainable, floating cities that we can't imagine now, that are based on the voluntary choice of citizens. I think we will have a marvellous world in the 21st Century.

Thinking about seasteading requires us to free ourselves of these broad political categories we're stuck with on land. People can make whatever community system they want on a seastead. What emerges will totally defy the broad categories we debate about now.

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 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.

Once you provide people with a platform to start their own country, every conceivable type of innovator reaches out to you with their own idea.

If seasteads advance blue-energy technologies, they'll create blue jobs. Millions of poor people living under exploitive governments are looking for a better choice. Seasteads won't attract them without offering them better options.