High Financier: The Lives and Time of Siegmund Warburg

Ferguson had access to Siegmund Warburg's papers, including an enormous personal correspondence, and produced an authorised biography of the banker who founded S.G. Warburg in London after fleeing Germany, and who reshaped British merchant banking.

The business achievements are specific. Warburg ran the 1959 contested bid for British Aluminium, the first hostile takeover in Britain, which broke the cartel-like conventions of the City and made contested acquisitions possible. He created the eurobond market with the 1963 Autostrade issue, which established a market in dollar-denominated bonds outside American regulation and which became the foundation of international capital markets. He also built a firm on principles that contradicted City practice, hiring on merit including refugees and Jews when the established houses would not, and insisting on analytical depth rather than social connection.

The cultural material is substantial. Warburg's letters show a European intellectual who read constantly, distrusted Anglo-American commercial culture and thought bankers should be advisers with independent judgement rather than transaction processors. Ferguson uses him to argue that finance was better when it was relationship-based and long-horizon, which is the book's implicit thesis.

Ferguson is admiring and the book is long, and readers should note that a biography built on a subject's own voluminous self-documentation reflects how he wished to be understood. The claim that Warburg's model was superior to what replaced it is asserted through the narrative rather than demonstrated. The eurobond and British Aluminium chapters are the most useful to finance readers.

Historian and senior fellow at the Hoover Institution, Stanford; previously taught at Oxford, Harvard and NYU Stern.

The Ascent of Money traces credit, bond markets, joint-stock equity, insurance and property finance from their origins, giving investors the institutional history behind instruments they price every day. The House of Rothschild and High Financier examine how two banking houses actually made money and managed sovereign and political risk over long periods.

Hoover Institution, Belfer Center, Harvard University, Oxford, Harvard