The Earth is Round doesn't appear in Church documents. So?

The argument of the OP is another sniping at the libertarian periphery instead of addressing actual Libertarianism, and trying to make it something it's not (including some commenters). Such authoritarian intellectual habits never did the Church any good.

The Libertarians ended feudalism, the Inquisition and now in modern form are ending the remnants of totalitarianism. This is good.