On the Law of Nature is at once a traditional and eclectic treatise of moral philosophy by one of the sixteenth centurys most widely read Protestant authors. Niels Hemmingsen (1513-1600) the Teacher of Denmark was a Danish humanist and theologian who studied with the Teacher of Germany Philip Melanchthon at the University of Wittenberg. Hemmingsen went on to serve as a professor at the University of Copenhagen--first of Greek then of dialectic and finally of theology. He wrote voluminously on me