This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book is about what a just society for people with disabilities might look like. It analyses the extent to which different approaches to distributive justice and human rights can justify the goods claimed by many people with disability as their just entitlements. The book argues for the concrete entitlements of people with disabilities which are so flagrantly denied in the real world. It discusses the language of relational equality as an attempt to skirt potential misunderstanding that can arise with the language of "recognition". The book assesses the extent to which different approaches to distributive justice or to human rights uphold the status of people with disabilities. It also discusses considerations of dignity in the day-to-day interactions that people with disability have with shopkeepers, colleagues, neighbours, care staff and others.