Another concept I found intriguing was his “Rule of 150”, that the number of people you can maintain a coherent social relationship with is about 150. He also delves into the “Stickiness Factor” and the “Power of Context.”
He cites quite a few examples of epidemics and how they spread. Everything from the resurgence in popularity of HushPuppies, the rise of Sesame Street, to crime waves.
I like how Malcolm Gladwell examines and explains ideas that normally one would never really consider or just totally overlook and gives the reader a whole new appreciation of the subject.