The Happiness Hypothesis by Johnathan Haidt

So I've been reading books about happiness.  Specifically about happiness approached from a scientific point of view--neuroimaging and various tests that try to get at what causes happiness, how to make people happier, why we are often bad at figuring out what will make us happy, and so on.  There has been a lot of good stuff there and it has been interesting.

And the most recent book has been The Happiness Hypothesis.  And it was pretty good, until about two thirds of the way through (half way through if one counts the references at the end). 

( Religion and morality; you know me by now and may prefer to skip this. That's perfectly okay. )