Introduction PART L THE NEW BEGINNINGS: 1650-1800 1. The Seventeenth Century 2. Mental Mechanism 3. Physiological Mechanism 4. The New Image of Human Nature PART II. THE NINETEENTH CENTURY 5. The New German Mechanism 6. Psychophysics and the New Psychology 7. The Impact of Darwin 8. William James PART III. THE THRESHOLD OF THE PRESENT 9. Psychoanalysis I: Sources 10. Psychoanalysis II: The General Theory 11. Gestalt Theory: The New Physicalism 1890-1912 12. Behaviorism I: The Advent of the Behaviorists 13. Behaviorism II: The Full Flowering 14. Epilogue: Ideals and Over-Beliefs