Professor emeritus of international history at the London School of Economics.

War and society in Europe of the Old Regime, 1618-1789
1988
ISBN 9780750916035
18th century Europe, 1713-1789
1961
ISBN 9789505571659
The Easter Question, 1774-1923
1966
ISBN 9780333000625
The ascendancy of Europe, 1815-1914
1972
ISBN 9781317868521
The rise of modern diplomacy, 1450-1919
1993
ISBN 9781306969338
The War of the Austrian Succession, 1740-1748
1995
ISBN 9781317899204
The origins of the modern European state system, 1494-1618
1998
ISBN 9781317892762