Étienne Henri Gilson was born into a Roman Catholic family in Paris on 13 June 1884. He was educated at a number of Roman Catholic schools in Paris before attending lycée Henri IV in 1902, where he studied philosophy. Two years later he enrolled at the Sorbonne, graduating in 1907 after having studied under many fine scholars, including Lucien Lévy Bruhl, Henri Bergson and Emile Durkheim. Gilson taught in a number of high schools after his graduation and worked on a doctoral thesis on Descartes, which he successfully completed (Sorbonne) in 1913. On the strength of advice from his teacher, Lévy Bruhl, he began to study medieval philosophy in great depth, coming to see Descartes as having strong connections with medieval philosophy, although often finding more merit in the medieval works he saw as connected than in Descartes himself. He was later to be highly esteemed for his work in medieval philosophy and has been described as something of a saviour to the field. From 1913 to 1914 Gilson taught at the University of Lille. His academic career was postponed during the First World War while he took up military service. During his time in the army he served as second lieutenant in a machine-gun regiment and was awarded the Croix de Guerre for bravery upon relief from his duties. After the war, he returned to academic life at Lille and (also) Strasbourg, and in 1921 he took up an appointment at the Sorbonne teaching the history of medieval philosophy. He remained at the Sorbonne for eleven years prior to becoming Professor of Medieval Philosophy at the College de France in 1932. During his Sorbonne years and throughout his continuing career Gilson had the opportunity to travel extensively to North America, where he became highly influential as a historian and medievalist, demonstrating a number of previously undetermined important differences among the period’s greatest figures. Gilson’s Gifford Lectures, delivered at Aberdeen in 1931 and 1932, titled ‘The Spirit of Medieval Philosophy’, were published in his native language (L’espirit de la philosophie medieval, 1932) before being translated into English in 1936. Gilson believed that a defining feature of medieval philosophy was that it operated within a framework endorsing a conviction to the existence of God, with a complete acceptance that Christian revelation enabled the refinement of meticulous reason. In this regard he described medieval philosophy as particularly ‘Christian’ philosophy. Gilson married in 1908 and the union produced three children, two daughters and one son. Sadly, his wife died of leukaemia in late 1949. In 1951 he relinquished his chair at the College de France in order to attend to responsibilities he had at the Institute of Medieval Studies in Toronto, Canada, an institute he had been invited to establish in 1929. Gilson died 19 September 1978 at the age of ninety-four.

Veatch was born in Evansville, Indiana. He obtained his Ph.D. from Harvard University in 1937 and spent his career at Indiana University (1937–1965), Northwestern University (1965–1973), and Georgetown University (1973–1983) where he was Philosophy Department Chair from 1973 to 1976. He also had visiting professorships at Colby College, Haverford College and St. Thomas University. Veatch was active in the Episcopal Church and served as president of the American Catholic Philosophical Association. He served as president of the Metaphysical Society of America in 1961. In 1970–71 he served as president of the Western Division of the American Philosophical Association. He was a member of the Guild of Scholars of The Episcopal Church. Henry Veatch died in Bloomington, Indiana. Indiana University maintains the archive of his collected papers (1941–1997).

Paul Ricoeur (1913–2005) is widely recognized as one of the most distinguished philosophers of the twentieth century. In the course of his long career he wrote on a broad range of issues. His books include a multi-volume project on the philosophy of the will: Freedom and Nature: The Voluntary and the Involuntary (1950, Eng. tr. 1966), Fallible Man (1960, Eng. tr. 1967), and The Symbolism of Evil (1960, Eng. tr. 1970); a major study of Freud: Freud and Philosophy: An Essay on Interpretation (1965, Eng. tr. 1970); The Rule of Metaphor (1975, Eng. tr. 1977); Interpretation Theory: Discourse and the Surplus of Meaning (1976); the three-volume Time and Narrative (1983-85, Eng. tr. 1984–88); Lectures on Ideology and Utopia (1986); the published version of his Gifford lectures: Oneself as Another (1990, Eng. tr. 1992); Memory, History, Forgetting (2000, Eng. tr. 2004); and The Course of Recognition (2004, Eng. tr. 2005). In addition to his books, Ricoeur published more than 500 essays, many of which appear in collections in English: History and Truth (1955, Eng. tr. 1965); Husserl: An Analysis of His Phenomenology (1967); The Conflict of Interpretations: Essays in Hermeneutics (1969, Eng. tr. 1974); Political and Social Essays (1974); Essays on Biblical Interpretation (1980); Hermeneutics and the Human Sciences (1981); From Text to Action (1986, Eng. tr. 1991); Figuring the Sacred: Religion, Narrative, and Imagination (1995); The Just (1995, Eng. tr. 2000); On Translation (2004, Eng. tr. 2004); and Reflections on the Just (2001, Eng. tr. 2007). The major theme that unites his writings is that of a philosophical anthropology. This anthropology, which Ricoeur came to call an anthropology of the “capable human being,” aims to give an account of the fundamental capabilities and vulnerabilities that human beings display in the activities that make up their lives. Though the accent is always on the possibility of understanding the self as an agent responsible for its actions, Ricoeur consistently rejects any claim that the self is immediately transparent to itself or fully master of itself. Self-knowledge only comes through our relation to the world and our life with and among others in that world. In the course of developing his anthropology, Ricoeur made a major methodological shift. His writings prior to 1960 were in the tradition of existential phenomenology. But during the 1960s Ricoeur concluded that properly to study human reality he had to combine phenomenological description with hermeneutic interpretation. For this hermeneutic phenomenology, whatever is intelligible is accessible to us in and through language and all deployments of language call for interpretation. Accordingly, “there is no self-understanding that is not mediated by signs, symbols, and texts; in the final analysis self-understanding coincides with the interpretation given to these mediating terms” (Oneself as Another, 15, translation corrected). This hermeneutic or linguistic turn did not require him to disavow the basic results of his earlier investigations. It did, however, lead him not only to revisit them but also to see more clearly their implications.

Jaeger attended school at Lobberich and at the Gymnasium Thomaeum in Kempen Jaeger studied at the University of Marburg and University of Berlin. He received a Ph.D. from the University of Berlin in 1911 for a dissertation on the Metaphysics of Aristotle. His habilitation was on Nemesios of Emesa (1914). Only 26 years old, Jaeger was called to a professorship with chair at the University of Basel in Switzerland. One year later he moved to a similar position at Kiel, and in 1921 he returned to Berlin. Jaeger remained in Berlin until 1936, when he emigrated to the United States because he was unhappy with Adolf Hitler's regime. Jaeger expressed his veiled disapproval with Humanistische Reden und Vortraege (1937) and his book on Demosthenes (1938) based on his Sather lecture from 1934. Jaeger's messages were fully understood in German university circles; the ardent Nazi followers sharply attacked Jaeger. In the United States, Jaeger worked as a full professor at the University of Chicago from 1936 to 1939, at which time he moved to Harvard University to continue his edition of the Church father Gregory of Nyssa on which he started before World War I. Jaeger remained in Cambridge, Massachusetts, until his death. The Canadian philosopher James Doull was among his students at Harvard. Jaeger wrote two dissertations, one in Latin and one in German, on Aristotle's Metaphysics. Jaeger's edition of the Metaphysics was printed in 1957. Only two years after editing Gregory of Nyssa's Contra Eunomium (1921), Jaeger became famous with his groundbreaking study on Aristotle in 1923 which largely remained undisputed until the 1960s. Jaeger founded two journals: Die Antike (1925–1944) and the influential review journal Gnomon (since 1925). Jaeger was the editor of the church father Gregory of Nyssa, Gregorii Nysseni Opera, editing Gregory's major work Contra Eunomium (1921, 1960). This edition is a major scholarly achievement and the philological foundation of the current studies on the Cappadocian Fathers. Jaeger is perhaps best known for his multivolume work "Paideia: The Ideals of Greek Culture", an extensive consideration of both the earliest practices and later philosophical reflections on the cultural nature of education in Ancient Greece, which he hoped would restore a decadent early 20th century Europe to the values of its Hellenic origins. Jaeger's last lecture, Early Christianity and Greek Paideia (1961) is a very impressive summary of his life's work covering Greek philology, philosophy and theology from Homer, the Presocratic philosophers, Plato to the Church Fathers, roughly a thousand years. Source

Roderick Milton Chisholm was an American philosopher known for his work on epistemology, metaphysics, free will, value theory, and the philosophy of perception. He was often called "the philosopher's philosopher. Chisholm graduated from Brown University in 1938 and received his Ph.D. at Harvard University in 1942 under Clarence Irving Lewis and Donald C. Williams. He was drafted into the United States Army in July 1942 and did basic training at Fort McClellan in Alabama. Chisholm administered psychological tests in Boston and New Haven. In 1943 he married Eleanor Parker, whom he had met as an undergraduate at Brown. He spent his academic career at Brown University and served as president of the Metaphysical Society of America in 1973. Chisholm trained many distinguished philosophers, including Selmer Bringsjord, Fred Feldman, Keith Lehrer, James Francis Ross, Richard Taylor, and Dean Zimmerman. He also had a significant influence on many colleagues, including Jaegwon Kim and Ernest Sosa.

Numerous published works of American educator and philosopher Mortimer Jerome Adler include How to Read a Book (1940) and The Conditions of Philosophy (1965). This popular author worked with thought of Aristotle and Saint Thomas Aquinas. He lived for the longest stretches in cities of New York, Chicago, San Francisco, and San Mateo. He worked for Columbia University, the University of Chicago, Encyclopædia Britannica, and own institute for philosophical research. Born to Jewish immigrants, he dropped out school at 14 years of age in 1917 to a copy boy for the New York Sun with the ultimate aspiration to a journalist. Adler quickly returned to school to take writing classes at night and discovered the works of Aristotle, Thomas Aquinas, John Locke, John Stuart Mill, and other men, whom he came to call heroes. He went to study at Columbia University and contributed to the student literary magazine, The Morningside, (a poem "Choice" in 1922 when Charles A. Wagner was editor-in-chief and Whittaker Chambers an associate editor). Though he failed to pass the required swimming test for a bachelor's degree (a matter that was rectified when Columbia gave him an honorary degree in 1983), he stayed at the university and eventually received an instructorship and finally a doctorate in psychology. While at Columbia University, Adler wrote his first book: Dialectic, published in 1927. In 1930 Robert Hutchins, the newly appointed president of the University of Chicago, whom Adler had befriended some years earlier, arranged for Chicago’s law school to hire him as a professor of the philosophy of law; the philosophers at Chicago (who included James H. Tufts, E.A. Burtt, and George H. Mead) had "entertained grave doubts as to Mr. Adler's competence in the field [of philosophy]" and resisted Adler's appointment to the University's Department of Philosophy. Adler was the first "non-lawyer" to join the law school faculty. Adler also taught philosophy to business executives at the Aspen Institute. Adler and Hutchins went on to found the Great Books of the Western World program and the Great Books Foundation. Adler founded and served as director of the Institute for Philosophical Research in 1952. He also served on the Board of Editors of Encyclopædia Britannica since its inception in 1949, and succeeded Hutchins as its chairman from 1974. As the director of editorial planning for the fifteenth edition of Britannica from 1965, he was instrumental in the major reorganization of knowledge embodied in that edition. He introduced the Paideia Proposal which resulted in his founding the Paideia Program, a grade-school curriculum centered around guided reading and discussion of difficult works (as judged for each grade). With Max Weismann, he founded The Center for the Study of The Great Ideas. Adler long strove to bring philosophy to the masses, and some of his works (such as How to Read a Book) became popular bestsellers. He was also an advocate of economic democracy and wrote an influential preface to Louis Kelso's The Capitalist Manifesto. Adler was often aided in his thinking and writing by Arthur Rubin, an old friend from his Columbia undergraduate days. In his own words: Unlike many of my contemporaries, I never write books for my fellow professors to read. I have no interest in the academic audience at all. I'm interested in Joe Doakes. A general audience can read any book I write—and they do. Source: http://en.wikipedia.org/wiki/Mortimer...