Maslow's theories of self-actualization and the hierarchy of human needs are the cornerstone of modern humanistic psychology, and no book so well epitomizes those ideas as this classic. Its influence continues to spread, decades after its author's death, beyond psychology and throughout the humanities, social theory, and business management theory. Its enduring popularity stems from the important questions it raises and the answers it provides concerning what is fundamental to human nature and psychological well-being, and what is needed to promote, maintain, and restore mental and emotional well-being.