Dan Haybron presents an illuminating examination of well-being, drawing on important recent work in the science of happiness. He shows that we are remarkably prone to error in judgements of our own personal welfare, and suggests that we should rethink traditional assumptions about the good life and the good society. Haybron's book is an excellent introduction to the problems of happiness and well-being. Though it is written in a rigorous analytic style, behind it there is a praiseworthy moral concern