This document discusses child sexual abuse, defining it as an abuse of power for the perpetrator's gratification. It notes that worldwide at least 20% of girls and 10% of boys experience abuse. The effects on children depend on other adversities and the support available to them, with trauma being common. Prevention requires addressing social forces that enable abuse like entitlement and victim-blaming beliefs, as well as perpetration prevention programs. Treatment is most effective when multi-modal and includes psychoeducation for the entire family.