In these essays Heinz von Foerster discusses some of the fundamental principles that govern how we know the world and how we process the information from which we derive that knowledge. Included are path- breaking articles concerning the principles of computation in neural nets (1967), the definition of self-organizing systems (1960), the nature of cognition (1970), as well as recent expansions on these themes (e.g. "How recursive is communication," 1993). Working with Norbert Wiener, Warren McCullough, and others in the 1960s and 1970s, von Foerster was one of the founders of the science of cybernetics, which has had profound effects both on modern systems theory and on the philosophy of cognition. At the Biological Computer Laboratory at the University of Illinois he produced the first parallel computers and contributed to many other developments in the theory of computation and cognition.

Robert Ornstein and Paul Ehrlich explain that we are causing our own problems because we have created a world where our basic mental functions are no longer suitable. We evolved over a period of millions of years to survive in small tribal families on the wild grassy plains of East Africa. Now the way we live has nothing to do with that time and place, but the mental tools that were developed to survive on the savanna have remained unchanged. These instincts were wonderfully adapted to the environment that shaped them. But that world, the world that made us, is gone. Now these same instincts are causing us to destroy the world that we made. The threats we face are of our own making, and we can unmake them. If people learn how we have come to this point, we can restore our hope for the future. New World New Mind describes the way our minds have evolved, and offers suggestions for how to cope with who we are in the world we live in now. Recent decades have seen remarkable progress in many areas. For example, despite the abject suffering of millions of people, it is nonetheless true that there has been unprecedented alleviation of poverty and disease for the world's poorest people. There are so many promising and astonishing advances in medicine, technology, and the social and physical sciences that if we give ourselves a chance to survive, our species could enter a golden age.