This is the first book to trace scholarly influence in criminology and criminal justice over a twenty-year time period. It is based primarily on the analysis of citations in major journals, but it also includes studies of publication productivity. This book shows that, over a twenty-year time period, the most influential topics in major criminology and criminal justice journals were either concerned with developmental/life course or longitudinal/criminal career research, or were expositions of major theories. Because of its identification of the most-cited scholars, the most-cited books and articles, and the most prolific publishers, this book will be of interest to all scholars and students in criminology and criminal justice and allied fields. In addition, its conclusions about the most influential theories and research should be of interest to policy makers, practitioners, and funding agencies.