This is a volume of thoughtful essays by a group of scientific leaders from physics, cognitive psychology, cognitive science, the philosophy of science, artificial intelligence, and brain psychology. It addresses fundamental issues such as, in the words of one of the contributors (Nobel Prize-winner Herbert A. Simon). "How a mind resides in a brain." The essays are set in the framework of the evolving scientific concept of complex adaptive systems, the basis for which is laid in an impressive essay by another Nobelist, physicist Murray Gell-Mann. The various chapters include studies of the neurobiology of mental representation, the brain architecture that bears on the organization of human memory, a connectionist approach to emotions and neuro-modulation, the possible neurobiological bases of consciousness, the new scientific understanding of human unconsciousness processes, and even the possibility of formulating a parallel distributed process computer simulation of daydreaming and nightdreaming. Scientists in the fields of brain biology, artificial intelligence, and psychology, as well as educators interested in the links of mind and brain, will find stimulating material for potential research and teaching in each chapter.