John M. Dillon is Emeritus Fellow and former Regius Professor of Greek at Trinity College Dublin as well as founder and Director Emeritus of the Centre for the Study of the Platonic Tradition in Trinity College. He is the author of many books on the history of the Platonic tradition, including The Middle Platonists; Alcinous, The Handbook of Platonism; Iamblichus, De Anima; The Heirs of Plato: A Study of the Old Academy, 347­–274 BC; and editor of three collections of essays on Platonism and Christianity and on the platonic heritage. In 2004 he was awarded the Academy Gold Medal in the Humanities by the Royal Irish Academy, and in 2010 he was elected a Corresponding Member of the Academy of Athens.

Henry J. Blumenthal was a leading British scholar in the area of Neoplatonism. From 1965 until his untimely death in 1998 he worked at the department of Classics and Archeology, University of Liverpool, starting out as lecturer in Greek, gaining full Professorship, and eventually becoming Head and then Chair of the department. He is the author of Plotinus' Psychology: His Doctrines of the Embodied Soul, and Aristotle and Neoplatonism in Late Antiquity. Many of his articles, spaning over a quarter of a century, were gathered and published in the collection Soul and Intellect.