This series will include monographs and collections of studies devoted to the investigation and exploration of knowledge, information, and data-processing systems of all kinds, no matter whether human, (other) animal, or machine. Its scope is intended to span the full range of interests from classical problems in the philosophy of mind and philosophical psychology through issues in cognitive psychology and sociobiology (concerning the mental capabilities of other species) to ideas related to artificial intelligence and to computer science. While primary emphasis will be placed upon theoretical, conceptual, and epistemological aspects of these problems and domains, empirical, experimental, and methodological studies will also appear from time to time. Few areas of inquiry have generated as much interest and enthusiasm in recent times as has the discipline known as "evolutionary psychology", but its pretentions and its accomlishments have not always been properly understood. This collection brings together important work in psychology, anthropology, and the philosophy of science that contributes toward that goal, especially by emphasizing the role of natural selection and sexual selection as crucial factors in the evolution of cognitive mechanisms for information processing. The methodological studies that are presented here are bound to enhance appreciation for the scope and limits of this fascinating domain. The editor has produced a fascinating volume that should appeal to a broad and diverse audience.