They believe public debt is unsustainable and call for discharging much of it in bankruptcy (“the Big Haircut”). They grant that the Treasury can keep selling bonds, but only so long as other countries’ credit is worse.

They see families moving far out in the exurbs (using self-driving cars) and earning money increasingly from individual enterprises rather than W-2 jobs. Therefore we should abolish the federal income tax and devolve government except for defense, civil rights and free internal trade to states and localities.

Most ambitiously, they would allow states to split into parts or to form compacts with other states, so likeminded citizens can have congenial policies.

Looking abroad, they see “a global collapse of the 2.0 model.” America should continue to purchase weapons (but get rid of defense procurement rules) and maintain our alliances.

But the U.S. should give up on nation-building and democratization. Other cultures — Iraq, Afghanistan — simply don’t share our concepts of freedom.

America’s main task is to police “the world’s maritime and aviation commons” — which Britain or America have been doing off and on for three centuries.