The document discusses norm engineering and how social norms can be influenced through various methods like media signals, influencer signals, and institutional signals. It describes a case study in Rwanda where radio soap operas were used to help reconcile ethnic groups and reduce violence by changing perceptions of social norms. Clinical studies showed that while individual minds may not change, altering the perceived social norm can change behaviors. The document advocates focusing communication on solutions rather than problems to help engineer norms that create a more positive world.