If you care about individual freedom and general prosperity, you'll want to avoid all shades of populism like the plague. It is economic illiteracy proudly proclaimed and writ large. As an alternative to libertarianism, it is bad in its own right—freedom is not on its agenda—but it is bad also because it is wedded to nationalism. That is, it treats the nation-state—not individuals and their projects—as the fundamental unit. It's ours against theirs. Disregard the hosannas to persons, families, and local communities. It's the nation that matters. Don't believe me? Then why do populists always...