Erik H. Erikson and Basic Trust vs. Basic Mistrust (Psychosocial Stages of Development)
Basic Trust vs. Basic Mistrust is the stage of the infant. After birth, we slowly familiarize our environment, eventually knowing that if Mother walks away, she will be back. Teething brings conflict as biting, the only relief, causes Mother to shy away. But if all goes well, we maintain ourselves against feelings of separation. If not, neuroses may develop, even schizo-depressive states.