Character Structure is a system of secondary traits that are manifested in the specific ways that an individual relates and reacts to others, to various kinds of stimuli, and to the environment. A child whose nurture and/or education cause them to have conflict between legitimate feelings, living in an illogical environment and interacting with adults who do not take the long-term interests of the child to heart will be more likely to form these secondary traits. In this manner the child blocks the unwanted emotional reaction that would have normally occurred. Although this may serve the child well while in that dysfunctional environment, it may also cause the child to react in inappropriate ways, by developing alternate ways in which the energy compulsively surfaces, ways damaging to his or her own interests, when interacting with people in a completely independent environment. Major trauma that occurs later in life, even in adulthood, can sometimes have a profound effect on character. See post-traumatic stress disorder. However, character may also develop in a positive way according to how the individual meets the psychosocial challenges of the life cycle.