As for Mr. Yang, he really is the only candidate talking about automation, artificial intelligence and machine learning in any sustained way, and as he correctly pointed out in Wednesday’s debate, those forces may do more to upend our economy and society than anything else (with the exception, of course, of climate change). His argument is that Donald Trump’s victory in the upper Midwest came as a result of job losses to automation (though President Trump blamed trade deals and immigration), and that the situation is about to get much worse as tech finds ways to replace retail workers, call center employees, truck drivers and myriad other middle skill positions (and eventually, many higher skilled jobs). He says that’s already contributing to the spike in suicide and overdose rates and could lead to much deeper social unrest. He may well be right about that. We can’t say for certain that his proposed solution of a universal basic income program is the right one — he would send $1,000 a month to every American over age 18 to spend however they like — but we need someone who can force all the other candidates to address the issue.