Its mission was to build a manmade island nation where inventors could work free of heavy-handed government interference. One early rendering shows an island raised on concrete stilts in eerily calm waters. The buildings atop the platform resemble nothing so much as the swanky tech campus of an entrepreneur's ultimate dream: No sign of land or civilization in sight. The island, despite appearing strapped for square footage, has room for a full-size swimming pool with deck lounges.

In a 2009 essay, Thiel described these island paradises as a potential "escape from politics in all its forms." It wasn't just desirable, he said. It seemed possible. "We may have reached the stage at which it is economically feasible, or where it will soon be feasible," he wrote.

More than a half-decade later, the dream has yet to be realized. And optimism is starting to waver.