SocialBonding,aProductofEvolution: anIntroductiontotheVolume Mechanisms underlying reproductive and maternal functions or coping represent the initialstructuringforcebehindmanysocialbehaviors.Theyareaccompaniedbysel- tivehormonalenvironmentsaimedatfacilitatingor stabilizingthem.Sexandadrenal steroids are major players in the regulation of reproductive functions and coping challenges, but other hormones also participate in a variety of social behaviors (in particular,oxytocinandvasopressin,twophylogeneticallyveryoldmoietiesoriginally associated with maternal care and water balance) and are receiving increasing att- tion. Their role is highlighted in the present volume, which gathers contributions to theColloqueMedicineetRecherche"HormonesandSocialBehavior"organizedbythe FondationIPSENinDecember 2007. Whatisthekeytounderstandingtherationaleofhormonalsubstratesofbehavior? Evolution, of course. Higher manifestations of social behavior have evolved from - productivebehavior,characterizedbyErnstMayras"theleadingedgeofevolutionary change." As formulated by one contributor to thisvolume, however, "the evolutionary increase in neocortex seen in primates has induced a signi?cant emancipation of - havior from hormonal determinants, and in parallel, an increasing role for intelligent socialstrategies"(Keverne 2008). In so-called "lower" mammalian animals, many social behaviors are closely - pendent upon the olfactory system, a component of autonomous regulation of such importancethatitexpressesalargeproportionofallreceptorgenespresentinthebrain. Whenonelooksat"higher"mammalssuchasprimates,olfactorycontrolbecomesless stringent. Olfactory structures exhibit the same number of receptor genes, but a large number are transformed into non-coding "pseudogenes." In parallel, hormones i- tially targeted on physiological functions become increasingly associated with more diversi?edcognitivefunctions.

This book covers topics that range from fundamental studies of DNA replication, chromosomal and nuclear function through growth factor control of endocrine tumor initiation and progression. The basic and translational insights gained from Hormonal Control of Cell Cycle will be of interest to those studying the biology of endocrine tumors as well as those deriving novel therapeutic approaches for these benign and malignant disorders.