Thirty years ago, strategy was the CEO’s job. Since then, as the composition of top executive teams has changed, responsibility for leading strategy development has been shared by more members of the C-suite. The 1990s saw the rise of the strategic CFO, and more recently many companies have created a chief strategy officer (CSO) position. For chief executives, developing a good strategy is a management challenge that, at its best, involves maximizing the unique contributions of very different executives and, at its worst, requires managing counterproductive tension and turf wars between CFOs, CSOs and, quite often, business-unit heads.