For generations, schools have aimed to introduce students to a broad range of topics through curriculum that ensure that they will at least have some acquaintance with most areas of human knowledge by the time they graduate. Yet such broad knowledge can’t help but be somewhat superficial—and, as Kieran Egan argues, it omits a crucial aspect of true education: deep knowledge.

Real education, Egan explains, consists of both general knowledge and detailed understanding, and in Learning in Depth he outlines an ambitious yet practical plan to incorporate deep knowledge into basic education. Under Egan’s program, students will follow the usual curriculum, but with one crucial addition: beginning with their first days of school and continuing until graduation, they will eachalso study one topic—such as apples, birds, sacred buildings, mollusks,circuses, or stars—in depth. Over the years, with the help and guidance of their supervising teacher, students will expand their understanding of their one topic and build portfolios of knowledge that grow and change along with them. By the time they graduate each student will know as much about his or her topic as almost anyone on earth—and in the process will have learned important, even life-changing lessons about the meaning of expertise, the value of dedication, and the delight of knowing something in depth.

Though Egan’s program may be radical in its effects, it is strikingly simple to implement—as a number of schools have already discovered—and with Learning in Depth as a blueprint, parents, educators, and administrators can instantly begin taking the first steps toward transforming our schools and fundamentally deepening their students’ minds.

Facts are facts, we often say with certainty; but values--well, they're relative. But every day we are confronted with situations where these simple distinctions begin to blur--whether our concerns are the roots of crime and violence, the measure of intelligence, the causes of disease, the threat and promise of genetic engineering. Where do our "facts" end and our "values" begin?

Recent developments in neuroscience have begun to shed light on this confusion, by radically revising our notions of where human nature ends and human nurture begins. As Edward Hundert--a philosopher, psychiatrist, and award-winning educator--makes clear in this eloquent interdisciplinary work, the newly emerging model for the interactions of brain and environment has enormous implications for our understanding of who we are, how we know, and what we value.

Lessons from an Optical Illusion is a bold modern recasting of the age-old nature-nurture debate, informed by revolutionary insights from brain science, artificial intelligence, psychiatry, linguistics, evolutionary biology, child development, ethics, and even cosmology. As this radical new synthesis unfolds, we are introduced to characters ranging from Immanuel Kant to Gerald Edelman, from Charles Darwin to Sigmund Freud, from Jean Piaget to Stephen Hawking, from Socrates to Jonas Salk. Traversing the nature-nurture terrain, we encounter simulated robots, optical illusions, game theory, the anthropic principle, the prisoner's dilemma, and the language instinct. In the course of Hundert's wide-ranging exploration, the comfortable dichotomies that once made sense (objectivity-subjectivity, heredity-environment, fact-value) break down under sharp analysis, as he reveals the startling degree to which facts are our creations and values are woven into the fabric of the world. Armed with an updated understanding of how we became who we are and how we know what we know, readers are challenged to confront anew the eternal question of what it means to live a moral life.