The document discusses the concept of professional jurisdiction and threats to the library profession's jurisdiction over certain tasks and areas of expertise. It argues that the library profession's "heartland" concerns memory work, such as defending privacy and access to information. However, the profession faces challenges from external claims to expertise and failure to stake claims in new areas. It calls for librarians to reassert their jurisdiction by letting evidence-driven knowledge guide decisions and extending jurisdictional claims in new domains like information organization.