Spensonia is a fictional Utopian country[1][2] created by the English author and political reformer Thomas Spence.
Spence's utopian works "were directed explicitly at the major institutions, economic and political, of the time.
When a ship carrying English merchant brothers is stranded on a remote island, the brothers decide to take the arrangement they had aboard ship, the "Marine Constitution" given to them by their father, and apply it to their life on land; and so they create a commonwealth of collective ownership.
Spensonia maintains cordial relations with other republics, and extends political asylum to refugees from tyranny.
News of the island of Spensonia is brought back to England by a figure named Captain Swallow.