With contributions from distinguished authors in 14 countries across 5 continents, this book provides a unique transnational perspective on intellectual disability in the twentieth century. Each chapter outlines different policies and practices, and details real-life accounts from those living with intellectual disabilities to illustrate their impact of policies and practices on these people and their families. Bringing together accounts of how intellectual disability was viewed, managed and experienced in countries across the globe, the book examines the origins and nature of contemporary attitudes, policy and practice and sheds light on the challenges of implementing the UN Convention on the Rights of Persons with Disabilities (UNCPRD).