Part I: PRODUCTIVE AND UNPRODUCTIVE DEPRESSION: 1. Finding a Model of Normal Depression, 2. Cause and Function of Emotions in General, 3. Cause and Function of the Basic Depressed Response 4. Influence on the Course Run by Depression 5. Depression as Affect, Emotion, Pattern of Emotion, or Syndrome 6. The Depressed Response Compared with other Affects, A: Grief, Anxiety, Depression, and Anger in Loss, Change, or Isolation 7. The Depressed Response Compared with other Affects, B: The Role of Shame and Guilt in Personal and Group Relations 8. Two Examples of Depression and Treatment 9. Handicaps Promoting Unproductive Depression 10. Diagnostic Perspectives Part II: DEVELOPMENT OF THE WORK OF DEPRESSION: 11. Development of the Function of Getting Depressed 12. Development of the Work of Depression, an Illustration 13. Family Influences on Development 14. Socio-Cultural Influences on Development Part III: AID TO THE WORK OF DEPRESSION: 15. Self-help and Informal First Aid 16. Professional Aid to the Depressed 17. Case Examples 18. Concluding Comments on Professional Aid.