Part 1 The evolutionary point of view: species diversity and the evolution of behavioural controlling mechanisms, D. Crews ecological constraints and the evolution of hormone-behaviour interrelationships, John C. Wingfield et al evolutionary perspectives on primate mating systems and behaviour, Alan F. Dixson emotion - an evolutionary by-product of the neural regulation of the autonomic nervous system, Stephen W. Porges. Part 2 Organismic perspectives on affiliation and social behaviour: psychobiological consequences of social relationships, S. Levine et al attachment relationships in new world primates, Sally P. Mendoza and William A. Mason hormonal modulation of sexual behaviour and affiliation in rhesus monkeys, Kim Wallen and Pamela L. Tannenbaum conflict resolution and distress alleviation in monkeys and apes, Frans B.M. de Waal and Filippo Aureli social facilitation, affiliation and dominance in the social life of spotted hyenas, Stephen E. Glickman et al affiliative processes and vocal development, Charles T. Snowdon. Part 3 Monogamous mammals as models for understanding affiliation and social bonds: brain sexual dimorphism and sex differences in parental and other social behaviours, Geert J. DeVries and Constanza Villalba peptides, steroids and pair bonding, C. Sue Carter et al molecular aspects of monogamy, Thomas R. Insel et al specific neuroendocrine mechanisms not involving generalized stress mediate social regulation of female reproduction in cooperatively breeding marmoset monkeys, David H. Abbott et al. Part 4 Neuroendocrine perspectives on social behaviour: brain systems for the mediation of social separation distress and social-reward - evolutionary antecedents and neuropeptide intermediaries, Jaak Panksepp et al physiological and endocrine effects of social contract, Kerstin Uvnas-Moberg early learning and the social bond, Eric B. Keverne et al neuroanatomical circuitry for mammalian maternal behaviour, Michael Numan and Teige P. Sheehan oxytocin control of maternal behaviour - regulation by sex steroids and offspring stimuli, Cort A. Pedersen mating-induced c-fos expression patterns complement and supplement observations after lesions in the male Syrian hamster brain, Sarah Williams Newman et al regulatory mechanisms of oxytocin-mediated sociosexual behaviour, Diane M. Witt. Part 5 Clinical perspectives on social behaviour: integrative functions of lactational hormones in social behaviour and stress management, C. Sue Carter and Margaret Altemus psychobiology of early social attachment in rhesus monkeys - clinical applications, Gary W. Kraemer psychological and neuroendocrinological sequelae of early social deprivation in institutionalized children in Romania, Mary Carlson and Felton Earls affiliation and neuropsychiatric disorders - the deficit syndrome of schizophrenia, Brian Kirkpatrick.