Some years acquire symbolic status, and one such year is 1968. All over Europe and the United States university students exploded into violent rebellion. Insofar as this would-be revolution had an ideology it was unquestionably Marx-inspired, even if the Marxism was not always orthodox. It so happens that in the years 1970–1971 I was teaching philosophy at Balliol College, Oxford. And because of Oxford University’s system, almost unique, of individual tuition for undergraduates, this meant I found myself in a continuing one-to-one relationship with bright students who were in the throes of revolutionary fervour.