This book explores the development and implementation of Child First as an innovative guiding principle for improving youth justice systems. Applying contemporary research understandings of what leads to positive child outcomes and safer communities, Child First challenges traditional risk-led and stigmatising approaches to working with children in trouble. It has now been adopted as the four-point guiding principle for all policy and practice across the youth justice system in England and Wales, it is becoming a key reform principle for youth justice in Northern Ireland, and it is...