Developmental theories of crime examine how criminal behavior emerges and changes throughout a person's life. These theories consider risk factors that increase the likelihood of criminal behavior and protective factors that reduce it. They also explore criminal trajectories, desistance, and cumulative disadvantage. Major developmental theories include Moffitt's dual taxonomy, Sampson and Laub's age-graded theory, and Farrington's ICAP theory. These theories integrate biological, psychological, and social factors to explain criminal behavior. They emphasize the importance of life events and transitions in shaping criminal trajectories.