This past fall, I gave the inaugural Joseph S. Nye lecture at Princeton. Nye is perhaps the world's pre-eminent theorist of power; he coined the term "soft power" for the power of attraction versus "hard power," the power of coercion. (Full disclosure: he's also a mentor and an old friend.) I used the lecture to contrast what I then called bottom-up power to what I argued was Nye's concept of top-down power. But, on reflection, I think "collaborative power" is a better and more accurate term for the phenomenon I am trying to capture.

Nye distinguishes between "resource power" -- resources that can produce outcomes, such as money, territory, etc -- and "relational power," which he defines as "the capacity to do things and in social situations to affect others to get the outcomes we want." Borrowing from various different power theorists and adapting their concepts of power to international relations, Nye then identifies three distinct "faces" of relational power. First is "commanding change": getting people or groups to do things they don't want to do. Second is "controlling agendas": the bureaucrat's favorite ploy of framing "agendas for action that make others' preferences seem irrelevant or out of bounds." And third is "shaping preferences": using "ideas, beliefs, and culture to shape basic beliefs, perceptions and preferences." This is hardly the place to engage Gramsci, Foucault, Giddens, and the many others who have examined the deep social and political structures of power. So, for present purposes, think of how soft power -- the attractive draw of Hollywood movies, American rock music, and the Declaration of Independence -- have shaped preferences around the world.

As with all of Nye's work, this analytical framework is elegant, compelling, and seemingly comprehensive. But where does the power that toppled Egyptian President Hosni Mubarak fit in? The power, evident in ongoing protests despite months of bloodshed, that will not be silenced or stopped in Syria? The power that brought NATO to use force to protect Libyan civilians? Or the power that freed Mona Eltahawy?

One familiar distinction is "power with" versus "power over." The power that interests Nye is the power that a person, group, or institution exercises over other people, groups, or institutions, getting them to do something they would not have done on their own. "Power with," on the other hand, is the power of multiple actors to get something done collaboratively. (I first heard this distinction from Harvard Law Professor Lani Guinier, but have since seen it in many places.) That certainly seems to capture the phenomenon we are witnessing in so many different places -- the networked, horizontal surge and sustained application of collective will and resources.

I will call it collaborative power and define it as the power of many to do together what no one can do alone. Consider the power of water. Each drop is harmless; enough drops together create a tsunami that can level a landscape.