Key to happiness

I stumbled across a study from last year: "About 45 percent of Republicans said they were very happy, compared with 30 percent of Democrats. Republicans have been happier in surveys going back to 1972, the Pew study notes. [...]
The Pew analysis does not answer the question of how religion, Republicanism and happiness might be related, however."

I can tell you that. The more tenuous a grasp of reality, the happier one is.