When you imagine a great leader, you probably picture a Fortune 500 CEO with a booming voice and a corner office. But leadership is not about dominance; it's about unlocking the collective genius of a group. And Hollywood may have more to teach us about that than the boardroom does. Let's start with Pharrell Williams: the multihyphenate is (among other things) a composer, a producer and the men's creative director for Louis Vuitton. He's also one of the most sought-after collaborators around, because he makes it about the project, not himself.