The highlands of Honduras’s Copán region, on the country’s Western border with Guatemala, remain nearly as socially isolated today as when the Mayans built one of their greatest civilizations there thousands of years ago. Far from Facebook, Instagram, or Twitter, however, researchers here are studying social networks, trying to map the true extent to which one’s connectivity can influence behavior and, more importantly, be leveraged to achieve positive outcomes. Originally published on October 4, 2015.