This document provides a brief history of mediation and conflict resolution practices. It notes that negotiation, arbitration, and mediation have existed for as long as humans have in many ancient cultures. Mediation became more formalized with international treaties and diplomacy. The first school mediation programs began in the US in the 1960s and spread to other countries in subsequent decades. The document also distinguishes mediation from arbitration and discusses what types of conflicts are and are not appropriate for school peer mediation.