There’s been a great discussion recently about what political libertarianism does and does not entail, and in what sense it is “neutral”. The main dialog is at Tech Central Station between Edward Feser who I think is confused here, and Will Wilkinson who is not confused here. Feser still seems confused here, and Wilkinson promises to respond again soon here.
Julian Sanchez and Randy Barnett also weigh in. And Barnett has a related, very interesting, paper available here.