This volume is an outgrowth ofcontemporary research on development over the adult lifespan, which by now has burgeoned and developed both nationally and internationally. However, for us, the impetus to be involved in this area was spawned and nurtured by our initial association with the Society for Research in Adult Development (SRAD) with its origins some 15 years ago by Michael Commonsand his associates inCambridge, Massachusetts. Throughthegood will and support of this society, we also became, and are still, heavily involved with the Journal of Adult Development and the Kluwer-Plenum Monograph Series on Adult Development and Aging, ofwhich this volume is a companion. Many ofthe contributions in the volume are from SRAD members, who con­ sistently adhere to a focus on positive adult development. Their chapters have been complemented by pieces from other researchers, who have adopted more mainstream approaches to adult development and/oraging. Regardless ofthe par­ ticular approach and/or focus of the chapter, all the work reported herein sup­ ports the relatively recent idea that development is not restricted to children and adolescents but continues throughout the adult lifespan in ways that we never envisionedsome 20 years ago. Thus, the volume represents state-of-the-arttheory, research, and practice on adult development, which has the potential to occupy us all for some time to come.