Early life environment and personality are two of the correlates of substance and behavioural addictions studied in many investigations, but these have infrequently been studied in the same population. The Parental Bonding Instrument (PBI) is a widely used instrument to measure of the perceived rearing in childhood. A structural equation model showed that both men and women with tendencies towards the three types of addiction characterized by high novelty seeking and reward dependence, as well as low self-directedness (SD), harm avoidance and persistence. Parental affectionless control influenced addictive tendencies both directly and through low SD. This new book discusses how immaturity of personality mediates the effects of poor early environment on the development of addictive tendency.