In Beyond Good and Evil, Nietzsche claimed that Christianity accomplished two things. First, it gave solace and dignity to the poor. They might have to spend their lives cleaning toilets, but they do so knowing they are sons of God just like the boss. Second, and more importantly for the author, Christianity neutered the men at the top of society. Nietzsche's antipathy for the faith seems to stem from this.
But the question is, how manly did he need European men to be? Looking across the centuries when Christianity dominated the continent, do those guys seem womanly to you?
Christianity is useful precisely because it can restrain the alpha males. If Nietzsche is right that the world is divided into two types--master and slave--then all the rest of us benefit if we can convince the masters to go easy on us.
I used GSS data to see if religion makes low-status people happier. Limiting to sample to whites with jobs no higher than working-class, the graph above shows that more frequent church attendance is associated with greater happiness (N = 3,585).