In 1965 at the University of Cambridge, two of the foremost American intellectuals were challenged with the question: ‘Has the American Dream been achieved at the expense of the American Negro?’ From William F Buckley’s highly stylised posturing and pointing, to James Baldwin’s melodious rhetorical flourishes and memorable scowls, what’s become known as the ‘Baldwin-Buckley Debate’ now stands as one of the archetypal articulations of the dividing line between US progressives and conservatives on questions of race, justice and history.