Wilfred Bion's synthesis of the approach of classical psychoanalysis based on the individual with that of group dynamics has been of enduring influence. The contributors to this volume, who have either been closely or personally associated with Bion, or stimulated to research by his ideas, examine his theories and demonstrate that a later generation is still actively working with the implications of Bion's writings. This book should be of interest to psychotherapists and psychoanalysts.