I wrote earlier about Arthur Brooks' Gross National Happiness. There I was reporting his headline finding that conservatives are happier than liberals. We read the whole book in our summer study group, so now I can report a bit more fully.
The first part of the book looks at marriage, parenthood, religion, and political ideology as they affect long-term happiness. Here is the summary contrast:
Married, conservative, religious parents who say they are very happy: 52%
Single, liberal, secular, childless people who say they are very happy: 14%