This will be my final post on Twenge's The Narcissism Epidemic. I recommend checking out the 53 page PDF file that contains all of Twenge's sources:
The notes for Chapter 10 - Materialism: The Spending Explosion and the Impact on the Environment are particularly relevant to our online discussion.
I would like to thank the numerous people who made thoughtful posts that led to some excellent online discussions. For those of you who have just found this blog, please feel free to add to the online discussion by posting your thoughts. Twenge's previous book, Generation Me, is also a fast and thought-provoking read.