For more information on this topic see Philip Pettit’s article from 2012 on “A Question for Tomorrow: The Robust Demands of the Good” [pdf]. Extract:
Humphrey Lyttelton, the English jazz musician, was once asked where he thought jazz was going. He replied that if he knew where jazz was going, he would be there already. I feel the same about being asked about the questions of tomorrow in the moral and political philosophy. If I knew what they were,
I would be there already. Which raises an interesting thought. Perhaps the best indication of what I think that the questions are is where I am already. And, following that thought, there is a clear path to follow, however narcissistic it may seem. This is to describe a question that I think important — indeed a question that is something of a personal hobby-horse — despite the fact that it is not currently much discussed. Induction from past evidence suggests that it is unlikely to become a question of tomorrow. But I live, as we all must do, in hope.
In thinking over a long period about the various ways in which freedom may be conceptualized, I came to see that it is, as I came to put it, a robustly or modally demanding value.