Ratzinger vs the 'Unity Law'

"Every explanation of reality that cannot at the same time provide a meaningful and comprehensible basis for ethics necessarily remains inadequate. Now the theory of evolution, in the cases where people have tried to extend it to a 'philosophia universalis,' has in fact been used for an attempt at a new ethos based on evolution. Yet this evolutionary ethic that inevitably takes as its key concept the model of selectivity, that is, the struggle for survival, the victory of the fittest, successful adaptation, has little comfort to offer. Even when people try to make it more attractive in various ways, it ultimately remains a bloodthirsty ethic. Here, the attempt to distill rationality out of what is in itself irrational quite visibly fails. All this is of very little use for an ethic of universal peace, of practical love of one's neighbor, and of the necessary overcoming of oneself, which is what we need. "