This edition of The State of the World’s Children argues that progress for the most disadvantaged children is the defining condition for delivering on the 2030 Sustainable Development Goals. The data in this report show, unless we accelerate the pace of our progress, the futures of millions of disadvantaged and vulnerable children – and therefore the future of their societies – will be imperilled. The flagship publication contains the latest update to the comprehensive statistics provided by UNICEF on child well-being.