When we question ourselves about what is good and what is bad, we look for a guide to direct our actions. Watching the change of values through history, the author reflects on the great contradiction between our biological heredity and our ethical ability. Autor: Francesco Alberoni Fecha: 1994 ISBN: 9788474325164 ISBN 10: 8474325161 PRESENTAS PARENTESIS DE MANERA PARCIAL EN MARGENES A LAPIZ Y PUNTUAL A BOLIGRAFO.