The key to organizing a hackathon is to start with the “Why?”
As Simon Sinek says in "Start with Why", great leaders inspire action because what motivates them is the meaning of a situation, not what to do or how to do it. (Sinek’s TED Talk is a must-see.)
Sinek explains how the Wright brothers, young farmers who never finished high school, became the first to build a machine that could fly, although their main rival for that claim had financial support from the U.S. War Department and was beloved by the New York Times. Why did the Wright brothers succeed? They possessed the deepest certainty that if they could make an aircraft that could leave the ground and fly through the air, the world would be changed forever.