Complex sentence: He succeeded John Plamenatz as Chichele Professor of Social and Political Theory in the University of Oxford and Fellow of All Souls College and was for many years Professor of Political Science and Philosophy at McGill University in Montreal, Canada, where he is now professor emeritus.
Split into simpler sentences: He succeeded John Plamenatz as Chichele Professor of Social and Political Theory at the University of Oxford and became a Fellow of All Souls College. For many years he was Professor of Political Science and Philosophy at McGill University in Montreal, Canada, where he is now professor emeritus.