This episode explores how humanity transformed instinctive revenge into structured justice. It begins with early human groups, where disputes were settled through retaliation, often escalating into endless cycles of violence. As societies grew larger, they needed predictable systems, leading to early forms of proportional punishment like “an eye for an eye,” which originally aimed to limit excessive revenge. The rise of writing allowed laws to be recorded, making justice more consistent and less emotional. Ancient civilizations grounded justice in divine authority, giving it moral weight. Over time, courts, judges, and evidence-based procedures emerged, turning justice into a rational process rather than a personal conflict. Philosophies and religions introduced ideas of mercy alongside punishment, while later social contract theories reframed justice as a shared agreement between citizens and the state. The episode also shows how legal systems have historically been used for oppression, and how social movements fought to correct injustice. In the modern era, new challenges arise—digital crime, AI, surveillance, mass incarceration—pushing societies to rethink what fairness means. It closes by examining restorative justice, which seeks healing rather than harm. Ultimately, justice is portrayed as an evolving human effort to make fairness stronger than fear.