About 6 months ago Communio released a report called “Nationwide Study On Faith & Relationships.” (HT @Ken)
the collapse in marriage and the resulting decline in resident fatherhood may offer the best explanation for the decline of Christianity in the United States.
…
Indeed, this finding is not entirely new.
Not new at all, but this is an interesting recent reconfirmation of it. Read Daddy Tried for further discussion of the importance of fathers in particular for the faith of their children.