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Chapter 9
Themes
and Colors
Key
LitCharts assigns a color and icon to each theme in The Power of Habit, which you can use to track the themes throughout the work.
Habits, Human Behavior, and Success
Habit Change and Personal Growth
Social Habits and Cultural Influence
The Moral Consequences of Habits
Summary
Analysis
After publishing The Power of Habit, Duhigg received many letters from his readers. For instance, one explained that the book convinced her to quit drinking and attend AA. He decided to contact some of the letter-writers and ask how the book influenced them.
These readers’ letters confirm Duhigg’s hope that his book would teach people to better control their habits and achieve their potential. By publishing them in this afterword, he hopes to show even more of his readers that they can do the same, if they faithfully apply the principles in his book.
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Tom Peyton lost 70 pounds by recognizing that boredom and stress cued him to overeat. He then built new routines like weighing himself every morning and going on walks every day. He still occasionally eats unhealthy food, but it’s infrequent and manageable. Duhigg remarks that he has used similar tactics to prevent his children from getting addicted to dessert.
Peyton used clear cues and compelling rewards to build new habits. His case is a reminder that nobody can ever fully eliminate old habit loops—but also that simply reducing and overpowering them is usually enough to change people’s lives.
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Personal trainer Eric Earle quit smoking by replacing it with different habits. He tried running, the sauna, and then meditation, which finally worked. In fact, quitters often need to experiment with and relapse into their bad habits several times before they can really understand their cues, routines, and rewards.
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The college teacher Pratt Bennet started teaching habit change to his first-year seminar students by making them submit “life-hack reports” every week. The students loved it and saw significant progress. Meanwhile, Bennet saved years of work by simply changing the way he checked his email.
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Finally, the woman who joined AA is still going—and has also started to lose weight. But she told Duhigg that his book should have also analyzed “the catalyst for change.” For her, it was pain. Duhigg concludes that his readers’ stories have shown him that anyone can change their habits—as long as they’re motivated to change. He encourages readers to email him with their own stories.
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