Catholic: "Liberal", "Conservative", or "Radical"?

Here is a long post, over at the always-interesting Vox Nova blog, on the question whether it makes sense to think of the Faith in "liberal" and "conservative" terms.  Here's a bit:

It is my conviction--and Pope Benedict XVI's many writings on law, society and politics confirm this--that Catholic perspectives on culture, society and politics will relentlessly challenge a world that has been interrupted by the advent of salvation in Jesus Christ. Something unexpected, something unanticipated, something foreign ought to be perceived by the world when Christians engage it with agape-caritas instead of conventionality-duty. And let me be frank: before a Christian can carry out such a glorious task, a Christian's mind and heart must be initially and continually transformed and renewed by the very same agape-caritas that is to be present to the world through that Christian's actions. This is a daunting and frightening prospect for the Christian, even after conversion, for this transformation and renewal never ceases as we plunge deeper and deeper into the mystery of divine love. Agape-caritas challenges our prevailing notions of love and, when extended into our actions in society, it challenges our prevailing notions of justice, shattering the simplistic reasonings and categories we cling to in our outlook of mundane tasks such as politics.