Bion's Legacy to Groups

'It is characteristic of some forms of scientific genius to alter not just what we see in the world, but how we see it - not just the view, but the lens. One thinks of Freud's discovery of the transference, or of Melanie Klein's attention to the play of children. Wilfred Bion's study of groups and group processes also has this quality. More than the content of what he saw and captured in the concepts of two modes of mental functioning in groups and in the differentiation of the basic assumptions