In a musty, multipurpose auditorium at the top of a winding staircase, close to 75 New Yorkers of many political stripes, from MAGA conservatives to progressive environmentalists, gathered Tuesday night to share their worries about the concentrated wealth and power steering today’s rapid AI development. “Artificial intelligence is not a problem of the future. It’s a source of power right now, to do great good and to do great harm,” proclaimed Jeremy Ornstein, one of the organizers, at the start