Herd behavior is a principled used to explain crowd movement. It was first discuss in W.D. Hamilton’s paper, Geometry For the Selfish Herd. The evolutionary biologist explained that an individual reduces danger or risk to his/herself by being as close as possible to the group that’s fleeing a particular event, person or place. Because of this, what seems like a unit acting in unison is actually unorganized behavior of individuals trying to protect themselves. This principle of biology is now commonly used to analyze a market crash by explaining investor sentiment.
Seed magazine has an interesting article that addresses how scientists look outside their science to understand relationships within.