“How’s that hopey, changey stuff working out for you?” Sarah Palin asked American voters in a taunting 2010 speech. The answer: Not so well. We avoided a full-blown depression, but the job market remains deeply sick, and it’s become quite mainstream to talk about the U.S. economy having fallen into structural stagnation (though the rich are thriving). Barack Obama has, if anything, seemed more secretive than George W. Bush. He kills alleged terrorists whom his predecessor would merely have tortured. The climate crisis gets worse, and the political capacity even to talk about it, much less do anything about…