The author exposes the doctrine of "Deontologic Liberalismo which is described, mainly, by J. Rawls, specially about the "privatization" that he makes of the human good and the consequent founding of the moral duties in a "public agreement". Then, he compares that to the doctrine of Millán- Puelles about the comunity and the objectivity of the human good, as well as of the founding of Ethics in the human nature and, finally, in the transcendent Absolute.