This report discusses innovation and risk from the perspective of the UK Government Chief Scientific Adviser. It argues that innovation is essential for economic growth but also carries risks. The report aims to help policymakers make better informed decisions about governing risks from innovation. It provides perspectives from different disciplines and case studies on topics like GM crops and financial services regulation to illustrate how risk decisions can significantly impact outcomes. The report invites public debate on applying principles of risk governance to local, national, European and global innovation decisions.