In The Hero with a Thousand Faces, Joseph Campbell laid out the structure for the monomyth (also known as the Hero’s Journey) — a template that many stories across various cultures and times seem to follow. Many famous movies and books can be mapped to the monomyth — Star Wars, Harry Potter, and The Lion King (Hamlet), to name a few.
The monomyth is a series of stages a hero goes through in an adventure. It roughly follows three major sections: departure, initiation, and return, further broken into subsections.
The first section of the first phase, departure, is called The Call to Adventure. The hero starts off in a mundane situation and receives information that acts as a call to head off into the unknown.
- In Star Wars, Luke Skywalker lives a mundane life on his uncle’s Tatooine farm until he discovers Princess Leia’s call for help in R2-D2.
 - In Harry Potter, Harry lives in a cupboard under the stairs in his uncle’s house until he discovers he’s a wizard (“you’re a wizard, Harry”) and has been accepted to Hogwarts.
 - In The Lion King, Simba lives a carefree life until his father tells him he will inherit the kingdom.
 
The Call to Adventure is important to study because that’s how most narratives start. It’s a disruption in the equilibrium. And since narratives underpin almost everything (including, and maybe especially, startups), it can be a way of either identifying the start of a story or creating a new one.
So, how does The Call to Adventure start? A few different patterns.
- Invitation from a Mentor or Guide.
 - Discovery of a Personal Ability or Artifact.
 - Threat or Attack on the Hero or Home.
 - A Sudden Change in Circumstances.
 - A Quest for Revenge or Justice
 - A Dream or Vision
 - The Pursuit of Love or Rescue Mission
 - Inadvertent Discovery or Mistake
 - Destiny or Prophecy
 - Personal Desire for Change
 - Call to Duty or Responsibility
 - Curiosity and Exploration
 - Natural Disaster or Phenomenon
 - Escape from Captivity or Oppression
 - Chosen by a Higher Power