In the magazine Foreign Policy, [Howard Gardner] argued in the spring for upper limits on the amount of income an American should be allowed to keep and the amount of wealth that can be passed on to beneficiaries ($4 million a year and $200 million, respectively). “It makes sense to be moderate politically only if there are two sides willing to engage,” he says. “The right wing isn’t just taking over the country, it’s shanghaiing all our values. If there’s a Republican administration after the next election, I would join in efforts for some sort of secession. It’s not the...