To mark the day, let me point you to an article I wrote about the old boy for Liberator some years ago:
It seems we have become obsessed by Mill’s harm principle. Yet it is only a small part of On Liberty: the essence of that work is not concerned with curbing liberty at all but is a glorious hymn in favour of its expansion.
Writing in Prospect magazine last year, Richard Reeves put it well:
for Mill, liberty consists of much more than being left alone. It requires choice-making by the individual. "He who lets the world… choose his plan of life for him, has no need of any other faculty than the ape-like one of imitation," he writes. "He who chooses his plan for himself employs all his faculties." For Mill, a good life must be a chosen life.
Or as The Levellers said more recently: "There's only one way of life, and that's your own, your own, your own."As it was to turn out, Reeves was a very good Mill scholar but less skilled as a special adviser to Nick Clegg.