By Gerhard Cardinal Müller, First Things - Counter to legend, Ratzinger was no simplistic foe of modernity. Christianity could accommodate many of the insights of Marxism, psychoanalysis, Darwinism, and other ideologies. But he was as steadfast as he was meticulous in ruling out what did not comport with Christianity. Indeed, he was a model of this work, as cardinal and as pope. Perhaps the most resounding instance was his dealings with the liberation theologians, early in his tenure as prefect of the CDF.