Human decision-making has become a subject of great interest to diverse social scientists. Psychoanalysts can add to this body of knowledge, focusing on genetic factors and on unconscious processes in general as they influence the decision-making process. Rangell reviews his model of intrapsychic functioning as it applies to the decision-making function of the ego. The ego function of decision-making has been generally neglected in the literature, though it is probably the most central function of all. The adequacy of the decision-making function is a major factor in determining ego efficiency and ego strength.