We all know what a voluntary action is - we all think we know when an action is voluntary, and when it is not. Yet, performing and action and defining it are different matters. What counts as an action? When does it begin? Does the conscious desire to perform an action always precede the act? If not, is it really a voluntary action? This is a debate that crosses the boundaries of Philosophy, Neuroscience, Psychology, and Social Science. This book brings (...) together some to the leading thinkers from these disciplines to consider this deep and often puzzling topic. The result is a fascinating and stimulating debate that will challenge our fundamental assumptions about our sense of free-will. (shrink)

Organisms are self-producing and self-maintaining, or autopoietic systems. Therefore, the course of evolution and adaptation of an organism is strongly determined by its own internal properties, whatever role external selection may play. The internal properties may either act as constraints that preclude certain changes or they open new pathways: the organism canalizes its own evolution. As an example the evolution of feeding mechanisms in salamanders, especially in the lungless salamanders of the family Plethodontidae, is discussed. In this family a large (...) variety of different feeding mechanisms is found. The authors reconstruct this evolutionary process as a series of bifurcation points of either constraints or opportunities forming a sequence of preconditions for the formation of a high-speed projectile tongue characteristic of tropical salamanders. Furthermore, it is shown how parallel evolution of seemingly unrelated domains within an organism such as respiratory physiology, life history biology and pattern of ontogeny has rather direct relevance to the feeding biology, thus demonstrating that organisms always evolve as wholes. (shrink)

Name der Zeitschrift: Jahrbuch für Wissenschaft und Ethik Jahrgang: 19 Heft: 1 Seiten: 65-76.