Six lectures delivered to an audience at the University of Sussex, Brighton by Hugh Trevor-Roper, Regius Professor of Modern History in the University of Oxford.

'A singular monument of human folly'... this was how the historians of the eighteenth century saw Europe's onslaught on Moslem Asia in the Crusades. But, Professor Trevor-Roper argues, the Crusades were only one manifestation of a general European expansion.
A Tonight presentation
These lectures are being printed in 'The Listener'