The Spreading of the Kindness Contagion

Altruism, like the coronavirus, spreads exponentially

Photo: Still Life Photographer Wolfgang Ludwig/Getty Images

IIt’s not only pathogens like the coronavirus that spread exponentially. For decades psychologists have documented the dark side of “social contagion”: binge-eating, risk-taking, and countless other deleterious behaviors. Yet only recently have academics turned their attention to the phenomenon’s brighter…