R.I. Aaron was born in Seven Sisters on 6 November 1901, but brought up in Ynystawe in the nearby Swansea Valley. He died in Aberystwyth on 29 March 1987. Aaron received his secondary education at Ystalyfera Grammar School before going on to University College, Cardiff, where he took honours degrees in history (1921) and philosophy (1922). In 1923 he was awarded the degree of MA for a dissertation entitled ‘The Relations of History and Science’, and in the same year he was elected to a fellowship of the University of Wales which enabled him to enter Oriel College, Oxford to study for the degree of DPhil. In Oxford, he met and admired W.D. Ross, H.A. Prichard and H.H. Joachim. He also established lifelong friendships with Gilbert Ryle, A.C. Ewing and Michael Foster. Aaron's thesis on ‘The History and Value of the Distinction between Intellect and Intuition’ gained the DPhil, and he was now appointed to his first teaching post, back in Wales, but under A.E. Heath in Swansea.
From The Continuum Encyclopedia of British Philosophy in Oxford Reference.