Martín Diego Farrell. Doctor of Law from the University of Buenos Aires, he is a professor of philosophy of law at this university and in that of Palermo and judge of the National Chamber of Federal Civil and Commercial Appeals of Buenos Aires. He has been a visiting professor at the University of Santiago de Compostela and the Autonomous Technological Institute of Mexico and Visiting Scholar of the universities of Yale, Columbia and New York. He is the author of thirteen books on ethics philosophy of law and political philosophy and more than seventy articles on these issues, published in Spanish, English, Italian and German.