"Resigning solution", individuals distance themselves from anyone perceived as a threat to avoid getting hurt – "the 'mouse-hole' attitude ... the security of unobtrusiveness." The argument is, "If I do not let anyone close to me, I won't get hurt." A neurotic, according to Horney desires to be distant because of being abused. If they can be the extreme introvert, no one will ever develop a relationship with them. If there is no one around, nobody can hurt them. These "moving away" people fight personality, so they often come across as cold or shallow. This is their strategy. They emotionally remove themselves from society. Included in this strategy are neurotic needs three, nine, and ten. In Aggression, also known as the "Moving against" or the "Expansive solution", the individual threatens those perceived as a threat to avoid getting hurt. Children might react to parental in-differences by displaying anger or hostility. This strategy includes neurotic needs four, five, six, seven, and eight. Related to the work of Karen Horney, public administration scholars developed a classification of coping by frontline workers when working with clients (see also the work of Michael Lipsky on street-level bureaucracy). This coping classification is focused on the behavior workers can display towards clients when confronted with stress. They show that during public service delivery there are three main families of coping: - Moving towards clients: Coping by helping clients in stressful situations. An example is a teacher working overtime to help students. - Moving away from clients: Coping by avoiding meaningful interactions with clients in stressful situations. An example is a public servant stating "the office is very busy today, please return tomorrow." - Moving against clients: Coping by confronting clients. For instance, teachers can cope with stress when working with students by imposing very rigid rules, such as no cellphone use in class and sending everyone to the office when they use a cellphone. Furthermore, aggression towards clients is also included here. In their systematic review of 35 years of the literature, the scholars found that the most often used family is moving towards clients (43% of all coping fragments). Moving away from clients was found in 38% of all coping fragments and Moving against clients in 19%. Heinz Hartmann In 1937, the psychoanalyst (as well as a physician, psychologist, and psychiatrist) Heinz Hartmann marked it as the evolution of ego psychology by publishing his paper,