This introduction presents an overview of the key concepts covered in the subsequent chapters of this book. The book explores current and retired judges, officials, lawyers and academics from Australia, Canada, South Africa and the UK to debate various questions. It encompasses both insider and outsider perspectives on the Judicial Appointments Commissions (JAC), with many of the contributors using their essays not only to reflect on the many challenges that the JAC has confronted during its first decade, but also to chart how it can tackle the challenges that are likely to define the next ten years. The terrains on which diversity debates play out have changed. In line with the international trend, there are now central roles across the UK for independent commissions in the appointment of judges to courts and tribunals. Over ten years on from its creation, the JAC today occupies what most regard as a secure place on the constitutional map.