The left was somewhat helpful in reducing teen pregnancy — because the programs to reduce it were government programs — but will be no help whatsoever in any attempt to rebuild marriage, not even if the pro-marriage program required a multi-billion dollar Federal bureaucracy to implement. The family is a non-state institution, and as such has to be destroyed or subordinated to the omnicompetent state. This is why the only aspect of human behavior that the left does not want to minutely regulate is sex: wanton unrestricted sexual behavior destroys the most fundamental non-state institution, the family, leaving the state to reign supreme in human affairs.
I'd love to see the math on that.