“…20-90). Bowlby certainly picked up the idea of a primary need for mother in this context (Newcombe & Lerner, 1982;Van der Horst, 2008 It is interesting to note that Bowlby started out in the orthodox Freudian school, picking up Klein's idea of the connectedness of childhood separation experiences and adult reactions to loss, but in his search for an explanation of that phenomenon gradually moved to the eclectic group of the Tavistock Clinic (Berrios & Freeman, 1991). Relying heavily on ethology as a new theoretical framework (Van der Horst, Van der Veer, & Van IJzendoorn, 2007) and on Harlow's separation experiments with young rhesus monkeys (Van der Horst, LeRoy, & Van der Veer, 2008), Bowlby would elaborate on the topic of maternal separation and grief and mourning in several papers in the early 1960s (Bowlby, 1960a(Bowlby, , 1960b(Bowlby, , 1961b(Bowlby, , 1961c(Bowlby, , 1961d(Bowlby, , 1963.…”