Giovanni Reale (15 April 1931 – 15 October 2014) was an Italian historian of philosophy. Biography Reale was born in Candia Lomellina, Pavia. He attended the Gymnasium and the Liceo classico of Casale Monferrato, and was then educated at the Università Cattolica del Sacro Cuore of Milan, where he graduated. He later continued his studies in Marburg an der Lahn and Munich. After a period of teaching in high schools, he won a professorship at the University of Parma, where he taught courses in moral philosophy and the history of philosophy. He then returned to the Università Cattolica del Sacro Cuore of Milan, where he was professor of the history of ancient philosophy for many years, and where he also founded the Centro di Ricerche di Metafisica. In 2005 he moved to teach at the new faculty of philosophy at Vita-Salute San Raffaele University of Milan. He died on 15 October 2014 in his home in Luino. Research His main argument is that categories of Greek philosophy and its particular way of thinking led to the birth and development of the science and technology in the West. His research interests range throughout the ancient pagan and Christian thought, and his most significant contributions have touched gradually Aristotle, Plato, Plotinus, Socrates and Augustine of Hippo. He studied each of these authors from an against-the-grain perspective, inaugurating, in the opinion of Cornelia de Vogel, a new reading of these authors. Reale's reinterpretation of Aristotle disputes the positivist-influenced interpretation of Werner Jaeger, according to which the writings of Aristotle are informed by a progression of dominant beliefs: at first, theology, where debate is in reference to God; then metaphysics, where the universal rights of man are the focus; and finally arriving at the viewpoint of science. Reale argued instead the fundamental unity of the metaphysical thought of Aristotle. Reale was one of the main proponents of the existence of Plato's unwritten doctrines or theory of the principles, a metaphysical theory ascribed to Plato by Aristotle and other ancient philosophers, but not clearly formulated in his writings. According to Reale, the best and most important part of Plato's philosophy was precisely the one orally expounded to the students in the Academy. Works Reale's main writings are: Il concetto di filosofia prima e l'unità della Metafisica di Aristotele, Vita e Pensiero, Milan (1961), then Bompiani, Milan (2008) Introduzione a Aristotele, Laterza, Bari (1974) Storia della