Here is a column about libertarians, who think, absurdly, that individual liberty is the summum bonum.

Addendum: Here is the PDF version, from Commentary magazine. The penultimate paragraph explains why I classify libertarians as progressives. The great divide in normative political theory (or, if you will, political morality) is between progressivism and conservatism. Progressivism has two main branches: egalitarianism, which exalts equality, and libertarianism, which exalts liberty. Conservatives know that there are many valuable things, not just one.