In ten years as chief of the Deutsche Bank, West Germany's largest, Hermann Josef Abs became the most distinguished figure in German finance. Only last year, no less an authority than David Rockefeller, president of the U.S.'s globe-spanning Chase Manhattan Bank, called him "the leading banker in the world." Suave, witty and self-assured, Abs was more than a banker: a confidant and consultant to monarchs and politicians, he became an unofficial ambassador to the world's financial centers and the undisputed éminence grise of German business.
Now, in keeping with the Deutsche Bank's retirement age of 65, Abs has just...