Sampson and Laub are criminologists known for their work on life-course criminology, particularly their theories regarding the development of criminal behavior over an individual's lifetime. They proposed that there are two distinct pathways to offending: life-course persistent offenders, who engage in criminal activity consistently from childhood into adulthood, and adolescence-limited offenders, who only commit crimes during their teenage years. Their research emphasizes the impact of social bonds and life events on criminal behavior, linking personal development with societal influences.