It is over 40 years since we began to reflect upon risk in a more social than technological and economic fashion, firstly making sense of the gap between expert and public assessment of risks, such as to our health and environment. With fixed certainties of the past eroded and the technological leaps of 'big data', ours is truly an age of risk, uncertainty and probability - from Google's algorithms to the daily management of personal lifestyle risks. Academic reflection and research has kept pace with these dizzying developments but remains an intellectually fragmented field, shaped by professional imperatives and disciplinary boundaries, from risk analysis to regulation and social research. This is the first attempt to draw together and define risk studies, through a definitive collection written by the leading scholars in the field. It will be an indispensable resource for the many scholars, students and professionals engaging with risk but lacking a resource to draw it all together.