I had to wait to read the last 10 pages to know that she was the answer from the author to the question posed by the title. In fact, I felt I was reading a story book ideas on the theme of happiness. If that's what you expect from this work, you will be filled because the study is undoubtedly interesting and part of the ancient philosophers to finish the materialism of Nietzsche. But what interested me was to have the humanist vision of the philosopher Luc Ferry, hence my disappointment since it is mentioned only briefly at the very end of the book.
