What social, psychological and spiritual principles of human behavior are the 12 step programs based on? How do they contribute to its success?

Write an essay answering the following questions for each addiction- Narcotics and Alcohol.
Essay should discuss the addiction programs separately.
Example: First page will answer the essay questions regarding Narcotics Anonymous 12 step program. Then, the second page will answer the essay questions regarding Alcoholic Anonymous 12 step program.
What social, psychological and spiritual principles of human behavior are the 12 step programs based on? How do they contribute to its success?
Implications for your professional practice. Who do you think would benefit from such a group? How would you go about preparing a client for such a group based on your initial experience? Who might have a hard time participating in such a group? What do you think are the keys to the success of this approach?
Integration of classroom materials with 12 step observations. How does this experience fit or not fit with information read for this class?