Damon Linker has a good piece on how unconstrained choice makes us unhappy.
I happened upon this piece as I was contemplating the central lie upon which libertarianism is founded: that we are autonomous individuals. This central principle of libertarianism is false historically, in evolutionary terms, and most of all, metaphysically. Rather than autonomous we are, as Alasdair MacIntyre put it, "dependent rational animals."
Being founded on a lie, libertarianism is destructive of human life, and it leads to other lies, such as the idea that our choices, just so long as we are not physically assaulting or robbing anyone else, are nobody's business but our own. And beginning one's reasoning with a lie cripples all of it, leaving libertarians flummoxed as to what could possibly be wrong with allowing a free market in human children.