To understand how complex dynamic systems, living or non-living, linguistic or non-linguistic, come to be organized as systems, to understand how their inherent dynamic nature gives rise to organizations and forms that have found a balance between potentiality for change and evolution on the one hand, and requisite stability in a given environment on the other, is the main ambition of the study of evolutionary systems. The aim of the present volume is to elucidate the scientific and philosophical backgrounds that play a role in the debate taking place in evolutionary systems, namely that on the relation between selection and self-organization. The book represents an interdisciplinary forum in which the major representatives of evolutionary systems take part.