Whose responsibility is it for revival to happen?

To use the word "amazing" to describe what is happening at my daughter's Asbury University campus doesn't cut it. We spoke on the phone this morning about all the wonderful things happening in the lives of the AU community: confession, repentance, forgiveness, healing, cleansing from sinful attitudes and behaviors, reconciliation, worship.
The questions I am asking, such as, "Who or what causes a revival to happen?" opens up two views on revival in the Christian movement.
One view of revival is that it is a sovereign move of God and no human can do anything to start it or stop it.
Another view says Christ-followers and even entire organizational initiatives will have a big part to play in seeing revival come about. For example, the Seedbed movement birthed out of Asbury Theological Seminary has likely spent millions of dollars "sowing for a great awakening." I've attended several Seedbed conferences where all manner of speakers, leaders and focused prayer times have sought for an Asbury University experience.
What other views of the causes of revival do you have? Of the above two, which one best represents your view?
