In that small but profound difference lay the quiet strength that kept two people moving forward together.… The first wedding in the district to include an official “Relationship Observer” drew more journalists than guests. At the front of the hall, beside the officiant and the couple, stood a third chair. It belonged to Dr. Maya Okafor, a psychologist trained not only in couples therapy, but also in behavioral economics, conflict mediation, and digital communication. Her appointment was voluntary, funded by a pilot program launched after governments around the world became increasingly concerned about the economic and social costs of family breakdown. Many people laughed at the idea. “So marriage now comes with a referee?” one commentator joked. Dr. Okafor disagreed. “A referee intervenes after rules are broken,” she replied. “An observer notices the stress accumulating before either person realizes it.” Arthur and L...