This process of emotional maturation aspires to a goal of Individuation or self-actualisation. Establishing that phenomenological properties are amenable to individuation by causal role therefore requires argument. Teilhard argued the noosphere evolves towards ever greater personalisation, individuation and unification of its elements. Thus, the individual atom is replaced by a never-ending ontological process of individuation. Individuality comes as a result of individuation as people are given more informed choices. Peer intimacy, peer individuation, and intergenerational individuation are strong predictors of psychological reactance. Hillman has also rejected individuation, central to Jungian psychology. Jung considered individuation to be the central process of human development. Analytic and contemporary philosophy continue to invoke his notions of identity, individuation, and possible worlds. In Lee's study subjects were either assigned to a deindividuation or individuation condition. Philosophers such as Aquinas use the concept of individuation. The word "individuation" occurs with different meanings and connotations in different fields. The embryo enacts the drama of individuation. The "fear of life" is the fear of separation and individuation. Information gathering is known as the concept of individuation.