Abstract
Marc Le Blanc consistently reiterated the importance of longitudinal research on crime and delinquency. His work has arguably transformed the field of criminology by driving theoretical perspectives from general to dynamic in nature, incorporating both static and dynamic factors as particularly relevant in understanding the breadth and scope of criminal behavior. This chapter reviews the vast contribution Marc Le Blanc had on the field of criminology, and the ripple effect that his research has had in terms of innovative analytical methods, an emphasis on longitudinal data collection, diversity in samples used, and the influx of trans-disciplinary collaboration.