To hear President-elect Donald J. Trump tell it, he is about to take over a nation ravaged by crisis, a desolate hellscape of crime, chaos and economic hardship. “Our Country is a disaster, a laughing stock all over the World!” he declared on social media last week.But by many traditional metrics, the America that Mr. Trump will inherit from President Biden when he takes the oath for a second time, two weeks from Monday, is actually in better shape than that bequeathed to any newly elected president since George W. Bush came into office in 2001.For the first time since...