If James McKinsey invented the idea of strategic planning, his successor, Marvin Bower, perfected it by turning the idea into a profession. Bower was obsessed about making sure he and his peers would not be dismissed as corporate parasites and would enjoy a respect similar to other early twentieth-century professionals like doctors, lawyers, engineers, and ministers. But for that to happen, he needed to come up with the rules, protocols, language, and codes of behavior-the whole culture-of the American consultant. As it happens, this was exactly what Bower was born to do. He had the focus, discipline, and fastidiousness that made it possible for him to give birth to the unique and enduring institution that McKinsey remains today. The military has the Marines; the Catholic Church has the Jesuits. Consulting, thanks to Bower, has McKinsey.