If you have standards, moral standards, you have to want to make them prevail, and at the very least you have to argue in their favor. Now, show me where libertarians have argued in some comprehensive way for a set of moral standards. … I don't think morality can be decided on the private level. I think you need public guidance and public support for a moral consensus. The average person has to know instinctively, without thinking too much about it, how he should raise his children.
Essay in the Wall Street Journal (1978).