He was co-editor of the Cambridge Texts in the History of Philosophy series, and he has translated and written an introduction for the Penguin edition of Descartes' Meditations on First Philosophy.
He retired from his position as Professor of Philosophy in 2006.Clarke was the founder and a general editor of Cambridge Texts in the History of Philosophy – 76 volumes have been published with new translations of non-English texts from ancient Greek, Latin, Arabic, Hebrew, French, Italian and German.