The Diffusion of Innovation (5th ed) by Everett M. Rogers is THE book for anyone who wants to understand this phenomena. This is the 2003 version, but it is still very current. I used this book a lot when I was doing my dissertation and revisit the concepts via this summary from time to time. I was prompted to post this today thanks to encouragement from Seth Godin. This is by far my longest summary so take your time.

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