If we divide Bion’s work into two major periods – the ‘group period’ and the ‘psycho-analytic period’ – they are clearly linked to his psychoanalysts John Rickman and Melanie Klein. One of Rickman’s aims, which Bion shared, was to apply psychoanalytic knowledge to the study of groups (Bion and Rickman, 1943 [1961]; Rickman, 1950 [1957]). Later on, Bion would follow Melanie Klein’s advice and abandon the group studies to dedicate himself to individual psychoanalysis.2