By Paul Kennedy

US presidents, in confronting crises, have often let it be known that they are serious students of history and biography. George W. Bush, an unusually voracious late-night reader, devours books on the lives of Great Men, including his hero Winston Churchill, (who in turn liked to read about his illustrious ancestor, Marlborough). Barack Obama looks to biographies of Abraham Lincoln for inspiration.

Given the enormity of the banking, credit and trade crisis, might it be worth suggesting to Mr Obama and his fellow leaders that they study the writings of the greatest of the world’s political economists, instead? After all, we may be in such a grim economic condition that the clever direction of budgets is a greater attribute of leadership than the stout direction of battleships.