“Americans’ wellbeing score increases steadily by the number of neighbors greeted, from 51.5 among those saying hello to zero neighbors to 64.1 for those greeting six neighbors.”
Gallup surveyed 4,556 adults and found the wellbeing score tops out at six neighbors greeted. Adults under 30 greet 2.9 on average. People 65 and older greet 6.5. Households earning $120,000 or more greet more too. Older, richer people are happier and also say hello more. Gallup measured a correlation and the headline sells it as advice.