Libertarians are not required to be socially liberal. I actually consider myself to be pretty socially conservative. Libertarianism is all about “defining the permissible use of force.” It has nothing to do with social values in my opinion. Reason seemed to say that the spread of gay marriage, interracial couples, rock music, porn are signs we are becoming more libertarian. It’s good that there are no government bans but the spread of these things seems irrelevant to libertarianism.