This document outlines a campaign called 70/30 that aims to reduce child maltreatment in the UK by at least 70% by 2030. The campaign has four elements: understanding the issue, marshalling support, designing action plans, and pilot studies. It discusses building political consensus, local area support, and community support. Key aspects include developing a strategy, gaining endorsements from politicians, presenting to local areas, and using an asset-based community development model. The goal is to prove the concept through pioneer communities projects that measure outcomes like disorganized attachment and show cost savings to justify expanded implementation.