Best known for his pioneering work in theories of self-organization and complexity, the biophysicist and philosopher Henri Atlan has during the past thirty years been a major voice in contemporary European philosophical and bioethical debates. In a massive oeuvre that ranges from biology and neural network theory to Spinoza's thought and the history of philosophy, and from artificial intelligence and information theory to Jewish mysticism and contemporary medical ethics, Atlan has come to offer an exceptionally powerful philosophical argumentation that is as hostile to scientism as it is attentive to biology's conceptual and experimental rigor, as careful with concepts of rationality as it is committed to rethinking the human place in a radically determined yet forever changing world.This is the first volume to bring together the major strands of Atlan's work for an English-language audience. It is an indispensable compendium for those seeking to clarify the joint stakes and shared import of philosophy and science for questions of life and the living-today and tomorrow.