This, in a nutshell, is Facebook’s problem : In a few weeks, when Facebook goes public, it will not have a single woman on its board. It’s not as if this problem will be solved by adding a single woman to the board. But it’s an important step, and one Mark Zuckerberg should take now. Mark Zuckerberg recently wrote that part of Facebook's mission is to build tools that will help create the "direct empowerment of people, more accountability for officials and better solutions to some of the biggest problems of our time." So why doesn’t Zuckerberg doesn't extend this philosophy to the way he runs...