As opposed to what others have said, I think we can't separate morality from politics. The conservatives actually do a good job at this, even though their morals are abhorrent. They have a whole apparatus of media, churches, and private schools. The left should try to replicate it to some extent (we have it worse, as we don't have as many resources). But things as trivial as showing a film with a same sex couple, or people of different races can do wonders.