Peter Adamson

Al-Kindi was the first philosopher of the Islamic world. He lived in Iraq and studied in Baghdad, where he became attached to the caliphal court. In due course he would become an important figure at court: a tutor to the caliph's son, and a central figure in the translation movement of the ninth century, which rendered much of Greek philosophy, science, and medicine into Arabic. Al-Kindi's wide-ranging intellectual interests included not only philosophy but also music, astronomy, mathematics, and medicine. Through deep engagement with Greek tradition al-Kindi developed original theories on key issues in the philosophy of religion, metaphysics, physical science, and ethics. He is especially known for his arguments against the world's eternity, and his innovative use of Greek ideas to explore the idea of God's unity and transcendence. Despite al-Kindi's historical and philosophical importance no book has presented a complete, in-depth look at his thought until now. In this accessible introduction to al-Kindi's works, Peter Adamson surveys what is known of his life and examines his method and his attitude towards the Greek tradition, as well as his subtle relationship with the Muslim intellectual culture of his day. Above all the book focuses on explaining and evaluating the ideas found in al-Kindi's wide-ranging philosophical corpus, including works devoted to science and mathematics. Throughout, Adamson writes in language that is both serious and engaging, academic and approachable. This book will be of interest to experts in the field, but it requires no knowledge of Greek or Arabic, and is also aimed at non-experts who are simply interested in one of the greatest of Islamic philosophers.

Ancient commentators like Ammonius and Boethius tried to solve Aristotle's “sea battle argument” in On Interpretation 9 by saying that statements about future contingents are “indefinitely” true or false. They were followed by al-Fārābī in his commentary on On Interpretation. The article sets out two possible interpretations of what “indefinitely” means here, and shows that al-Fārābī actually has both conceptions: one applied in his interpretation of Aristotle, and another that he is forced into by the problem of divine foreknowledge. It also explains the relevance of al-Fārābī's remarks as a link between the non-statistical modal theories of Philo and Avicenna

Peter Adamson offers an accessible, humorous tour through a period of eight hundred years when some of the most influential of all schools of thought were formed. He introduces us to Cynics and Skeptics, Epicureans and Stoics, emperors and slaves, and traces the development of early Christian philosophy and of ancient science. A major theme of the book is in fact the competition between pagan and Christian philosophy in this period, and the Jewish tradition appears in the shape of Philo of Alexandria. Ancient science is also considered, with chapters on ancient medicine and the interaction between philosophy and astronomy. Considerable attention is paid also to the wider historical context, for instance by looking at the ascetic movement in Christianity and how it drew on ideas from Hellenic philosophy. From the counter-cultural witticisms of Diogenes the Cynic to the subtle skepticism of Sextus Empiricus, from the irreverent atheism of the Epicureans to the ambitious metaphysical speculation of Neoplatonism, from the ethical teachings of Marcus Aurelius to the political philosophy of Augustine, the book gathers together all aspects of later ancient thought in an accessible and entertaining way.

L'analisi dell'aristotelismo «platonizzante» nell'ambito della filosofia araba prima della sistemazione della Shifa di Avicenna, secondo cui Dio non avrebbe conoscenza dei particolari, consente all'A. di dimostrare come ci siano stati anche approcci platonici ad Aristotele, che non sono passati attraverso il filtro dei neoplatonici greci. L'altra cosa significativa è il fatto che all'interno della scuola di Baghdad vi sono modi diversi di intendere lo stato ontologico degli universali. L'A. tenta anche di ridimensionare la figura di al-Farabi all'interno della scuola di Baghdad. I filosofi considerati sono al-Farabi, Yahya b. Adi e Ibn al-Tayyib.

Al-Kindi was influenced by two Greek traditions in his attempts to explain vision, light and color. Most obviously, his works on optics are indebted to Euclid and, perhaps indirectly, to Ptolemy. But he also knew some works from the Aristotelian tradition that touch on the nature of color and vision. Al-Kindi explicitly rejects the Aristotelian account of vision in his De Aspectibus, and adopts a theory according to which we see by means of a visual ray emitted from the eye. But in the same work, al-Kindi draws on Philoponus.

This paper studies the first metaphysical theory in Arabic philosophy, that of al-Kindi, as found in "On First Philosophy" and other of his works. Placing these works against the background of translations produced in al-Kindi's circle (the "Theology of Aristotle," which is the Arabic version of Plotinus, and the "Liber de Causis," the Arabic version of Proclus' "Elements of Theology"), it argues that al-Kindi has two conceptions of being: "simple" being, which excludes predication and derives from Neoplatonism, and "complex" being, which is based on Aristotle's notion of substance. At the end of the paper the "simple" notion of being is seen to anticipate in some respects Avicenna's distinction between existence and essence.

Avicenna's notorious claim that God knows particulars only 'in a universal way' is argued to have its roots in Aristotelian epistemology, and especially in the "Posterior Analytics". According to Avicenna and Aristotle as understood by Avicenna, there is in fact no such thing as 'knowledge' of particulars, at least not as such. Rather, a particular can only be known by subsuming it under a universal. Thus Avicenna turns out to be committed to a much more surprising epistemological thesis: even humans know particulars only in a universal way.