How Ideas Become Contagious Online

Hivemind author Sarah Rose Cavanagh argues that humans swarm in sync and change course en masse

Credit: Courtesy of Sarah Rose Cavanagh

Sarah Rose Cavanagh doesn’t see the impact of social media as all good or all bad — instead, the psychologist calls herself a “techno-pragmatist.” In her new book Hivemind: The New Science of Tribalism in Our Divided World, Cavanagh looks at the…