Preface. Biological and Social Approaches to Individuality: Towards a Common Paradigm; J. Hettema, I.J. Deary. Genetic and Environmental Influences on Adult Personality: Evaluating the Evidence; T.J. Bouchard, Jr. Behavioral Genetics: Variables, Mechanisms and Disorders. Commentary; I.J. Deary. From DNA to Social Behaviour: Conditions for a Paradigm of Personality Research; H.J. Eysenck. The Genes and P. Commentary; J.C. Loehlin. Reply to J.C. Loehlin; H.J. Eysenck. Personality from Top (Traits) to Bottom (Genetics) with Stops at Each Level Between; M. Zuckerman. Identifying Basic Dimensions of Personality. Commentary; G.L. Van Heck. The Location of the Regulative Theory of Temperament (RTT) among other Temperament Theories; J. Strelau. The Regulatory Theory of Temperament: the View from the Top. Commentary; R.M. Stelmack. Biosocial Adaptation: a Strategic-Tactical Approach to Individuality; J. Hettema. Strategies and Tactics for Person-Situation Interaction. Commentary; R.J. Larsen. Strategic Individual Differences: the Role of Personality in Creating and Solving Adaptive Problems; D.M. Buss. Evolutionary Psychology: Where to? Commentary; A. Angleitner. Reply to A. Angleitner; D.M. Buss. Linking Biological and Social Approaches to Personality: Evolution, Gender, and Cognition; D.T. Kenrick. Can Biology help Personality? Commentary; W.K.B. Hofstee. Marginal Deviations, Aggregate Effects, Disruption of Continuity, and Deviation Amplifying Mechanisms; G.V. Caprara. The Long Road from Marginal Deviations to Major Effects. Commentary; I. Mervielde. Reply to I. Mervielde; G.V. Caprara. Personality: an Interactional Perspective; N.S. Endler. Have Trait Psychologists been Ignorant of Context? Commentary; B. de Raad.Subject Index.