I have not read this book but based on the article, I feel the concepts in Malcolm Gladwell's Outliers > This book. Relationships do not prove causality, but David tries to with the stories of Van Gogh and Tiger Woods and Federer? The examples in the article leave me frustrated because professional artists and sports icons are not a repeatable success. Using those people as examples of success is bad data. I don't comment, this article bugged me for some reason. My takeaways are: Specialization matters, how you find 'your thing' is up to you. And figure it out well before you turn 40, unless you are Van Gogh.