This book is open access under a CCBY license. Child poverty is one of the biggest challenges of today, harming millions of children. In this book, it is investigated from a philosophical social justice perspective, primarily in the context of modern welfare states. Based on both normative theory (particularly the capability approach) and empirical evidence, the authors identify the injustices of child poverty, showing how it negatively affects the well-being of children as well as their whole life course. But child poverty is not 'given by nature'. It is avoidable and there is certainly the moral duty to alleviate it. Therefore, Graf and Schweiger develop a normative theory of responsibilities, which clarifies the moral role of different agents in the poor child's environment - the family, the state and many others, that have so far been neglected in philosophical theories. They conclude their book by sketching how their theory can be extended to global child poverty and what it means to show equal respect and concern for every child - no matter where and in which context they were born.