The premise of this book is that to be completely happy is not something that should be attainable for long periods of time; he is not arguing that there are not people out there who are clinically depressed or have disorders. Rather, this is about how society (Americans in particular) are so focused on happiness that they do not understand that to be happy there must be sadness. This idea is interesting, but the book lacks convincing examples and discussion. It felt like the author just liked to hear himself ‘talk.’ I wouldn’t recommend this book.