Sophrosyne is a constellation of characteristics that includes moderation, reflectiveness and self-knowledge. PM Images/DigitalVision via Getty Images Texting while driving. Bullying people on social media. Buying into the latest conspiracy theory. Passing off AI-generated work as your own. That may seem like a random list of 21st-century vices. But I’d argue they’re all examples of the loss of one particular virtue: sophrosyne. An ancient Greek concept, sophrosyne – pronounced “suh-fros-uh-nee