Most of us tend to think that there are two kinds of people in world: those who have power, and those who don't. But in reality, says Stanford Business School professor Deborah Gruenfeld, we all have more power than we think. And success is not about how much power we have, but rather how we use it. It's often assumed that power flows to those with the highest rank, the loudest voice, or the most commanding presence in the room. But in fact, there exists a quieter, softer sort of power that's just as crucial to learn to wield as the forceful kind. In life just as on stage, sometimes the most powerful actor is the one in the supporting role rather than the lead.