It’s no secret that JPMorgan Chase, our biggest and most profitable bank, is struggling with the question of succession. When you are looking to replace a guy like Jamie Dimon, the greatest banker of his generation, you don’t want to make a mistake. Before Dimon got to JPMorgan Chase, in 2005, the place was essentially a mess—a mishmash of poorly integrated mergers and cultures, under the leadership of the elegant but flawed Bill Harrison. (Loyal readers will recall, of course, that I was there and remember those days well.) Harrison’s best decision as C.E.O. was acqui-hiring Jamie via the Bank One deal, and then promptly getting out of the way so that he could run the place.