If the soul of a society can be judged by the way it treats its most vulnerable members, then by a similar measure, a society’s future – its long-term prospects for sustainable growth, stability and shared prosperity – can be predicted by the degree to which it provides every child with a fair chance in life. Providing every child with that fair chance is the essence of equitable development. And as this edition of The State of the World’s Children argues, promoting equity is more than a moral obligation. It is both a practical and a strategic imperative, helping to break intergenerational cycles of disadvantage and thus reducing the inequalities that undermine all societies.