Known for such works as Posterior Analytics, The Cambridge Companion to Aristotle, and Coffee with Aristotle, this academic and ancient philosophy expert taught at Oxford University, the University of Geneva, and the University of Paris-Sorbonne.
After graduating from Balliol College, Oxford, he published his first scholarly work, The Ontological Argument.
In the late 1980s, he became a British Academy fellow.
His marriage began in 1965 and resulted in two daughters. His novelist brother, Julian Barnes, won the Man Booker Prize for a 2011 work titled The Sense of an Ending.
He and Harvard University professor Rogers Albritton both became recognized as scholars of ancient philosophy.