This book comprises a compilation of chapter-essays from some of the world's leading authorities on adult guardianship law. The essays cover a wide range of topics from both theoretical and practical perspectives. Part I of the book introduces some of the basic concepts that transcend the national guardianship system, approaching these concepts from a comparative perspective. Part II's essays provide comprehensive information on guardianship systems around the world. Essays in Part III outline an ambitious agenda for reforming adult guardianship regimes. The book is a must read for those concerned with the role of national and international law in defining and expanding the rights of older persons and persons with disabilities who are at risk of being placed under guardianship due to cognitive or other disabilities.