I admit that, in contrast to a physicist talking about a physical process or a historian talking about a historical period, I can’t claim any special authority when it comes to talking about happiness. On the one hand, happiness is to an extent a personal matter, and what would be the point of me speculating about something you know as much about as I. On the other hand, happiness is a topic for science. Think of the science of the human brain, of serotonin and dopamine; think of psychology and, if you want, of happiness economics. Philosophers qua philosophers are not experts in any science nor, one might be tempted to add, in anything else, it seems. The main expertise philosophers can nowadays claim is second-hand: they think about and try to understand what other people have said, mainly, but not exclusively, other philosophers. This talk will take you through some of the main views about happiness, both historical and contemporary. I will try to structure debates and disagreements and, hopefully, I end up with a view of happiness that provides reasonable answers to questions both about the nature of happiness and about the significance it holds in our lives. If, in the end, you are happy with this, what more could I want?