The eight ages of man or epigenetic stages in the development of self described by Erik Erikson: (1) The oral-sensory stage, in which the infant must make sense of the world and decide the degree to which it is sufficiently predictable so as to sustain continuing social relationships, which is called basic trust. (2) The anal-muscular stage, in which the young child learns to control its body and decides on the degree to which he/she has the capacity to exercise control over the self rather than relying on external controls, which is called autonomy. (3) The locomotorgenital stage, in which the child learns to control its abundant energy and channel it into socially defined roles and decides the degree to which her/his energy can be used in socially approved ways, which is called purpose. (4) The latency stage, in which the child applies her/his energy and abilities to learning the skills, tasks, and roles which the culture deems appropriate for her/him and decides the degree to which he/she can succeed within the culture, which is called industry. (5) The puberty and adolescence stage, in which the teen begins to think for himself/herself using a larger social frame of reference and begins switching the identification of self from a relatively narrow one of family and the short term to society as a whole and lifelong goals, often undergoing a crisis in self-understanding whose resolution is called identity, which is a commitment to sexual, group, economic, and moral roles. (6) The young adult stage, in which the individual seeks a sexual/procreational partner and establishes a long-term emotional, social, and economic partnership with him/ her for the purpose of creating a family, whose completion is called intimacy. (7) The stage of adulthood in which the individual applies his/her skills and creative abilities to the tasks of supporting himself/herself and family through accomplishing work in a varied set of roles which both sustain and change the culture as a whole, whose accomplishment is called generativity. (8) The stage of maturity in which the self must accept the limitations of one human lifetime with a psychohistorical perspective and accept death while maintaining interest and commitment to life, whose achievement is called ego integrity.