Why? Being an MD isn't a huge deal in these cases. Not to say that having knowledge of the fundamentals of biology or healthcare isn't useful, but managing thou

Why? Being an MD isn't a huge deal in these cases. Not to say that having knowledge of the fundamentals of biology or healthcare isn't useful, but managing thousands of people, complex human systems, mass organizations, and building a plan to eliminate a disease is not something they teach in medical school. Gates has done more to battle malaria and other diseases than anyone currently alive. His track record is second to none, in terms of building a huge strategy, managing complex systems, and executing a pragmatic plan. And I suspect he has many MDs in his close circle of advisers who he relies on. A leader doesn't need to be a specialist -- they need to be a leader, a generalist, and rely on a team for specialist knowledge.