Since the time of Aristotle, great thinkers have discussed two types of happiness. One type can come from chocolate, an expertly made cup of coffee, a spot of sunbathing, or a good back scratch. Such things are said to bring hedonic happiness. If we were being a little less pompous, we might say ‘pleasure’. Hedonic happiness might also be identified in the absence of pain and suffering. The pleasure of a good night’s sleep is often unavailable to us when we have some important matter pressing on our minds. The other kind of happiness is eudaimonia, which Prof Daniel Robinson (Georgetown and Oxford) has referred to as ‘living a flourishing…