This conclusion presents some closing thoughts on the concepts covered in the preceding chapters of this book. The book discusses the ways in which pre-crime is spreading and intensifying. In a period of less than two decades, "extraordinary" pre-crime laws have become permanent, spread, intensified and become normalized as a feature of criminal law. It addresses its aims of developing the language and conceptual tools required to capture the shift to pre-crime, demonstrating how pre-crime produces crime and insecurity and describing the deleterious effects of pre-crime on justice and society. The book acknowledges the limitations and unfinished business of this first in-depth treatment of pre-crime and suggests some directions for future research in order to continue to build knowledge about the impacts of pre-emption on crime and justice. It expresses the hope for a more promising future built on a precautionary approach to justice.