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.

The third volume in a projected four-part series on the evolution of human intelligence, a series acknowledged by opponents and supporters alike as one of the most important recent investigations into the sources and nature of human intelligence. Professor Itzkoff first sets forth the evolutionary facts as a beacon to illuminate his biological theory of variable intelligence. Filling out the evidence from the psychological and brain sciences presented in THE FORM OF MAN and TRIUMPH OF THE INTELLIGENT, he here develops a full-scale model of the mind that more fully explains the relationship between I.Q. and the broader expressions of human intelligence as experienced in daily life. (His model of variable intelligence further delves into the historical consequences of our ancient biological and psychoneurological heritage. Issues such as gender, race, and ethnic variability are treated factually and responsibly, taking into account the full range of empirical evidence available to scholars.) The result is a theory having three complementary bodies of evidence - evolutionary, psychoneurological, and historical - building into a perspective on the factual «why» of human intellectual differences. These differences can best be observed in the richness and diversity of individual personality as well as in the cultures of our world. Itzkoff here takes the first tentative steps toward a biological explanation of the nature and structure of culture. WHY HUMANS VARY IN INTELLIGENCE is an appeal for the rational study of human nature, a plea to allow for further nonideological research into this most crucial area of contemporary concern.

The Form of Man presents a new interpretation, consonant with Darwinian evolutionary theory, recent evidence of human evolution, and the realities of cultural life. The exploration begins with the study of the form of life, traversing the tentative gropings of intelligent organic matter in its long struggle to establish itself as life's major adaptation. Seymour Itzkoff explains how intelligence as an adaptation is the slowest and most complex of life's vehicles to escape the degradation of energy predicted by the second law of thermodynamics. Dr. Itzkoff proposes that two evolutionary processes were keys to shaping human nature along its own particular path. Paedomorphosis (infantilization) explains many of man's unique anthropoid features. Orthoselection (evolution in a straight line) allows us to complete a picture of mankind's rapid catapult in brain size expansion almost into our own day. Both concepts reveal how man could have escaped the close selective honing that would have made him a far more practical creature. The final dramatic moment came with the sudden icy extrusion of a super sapient, Homo sapiens sapiens, sometime after 100,000 B.P. It ransformed the structure of all existing transitional hominids and created the conditions for both the growth of civilization and the paradoxical dilemmas and tragedies in our present polyglot humanity.