Home › Authors › Phillips P. O'Brien 👤 Phillips P. O'Brien b. 1963 ยท 5 books Biography Phillips Payson O'Brien (born 1963) is an American historian and professor of strategic studies at the University of St Andrews, Scotland. He was formerly at the University of Glasgow where he ran the Scottish Centre for War Studies. Books by Phillips P. O'Brien War and Power 2025 How the War Was Won 2019 The Second Most Powerful Man in the World 2019 The Anglo-Japanese alliance, 1902-1922 2004 British and American naval power 1998