Here's why it's considered the main event:
* It's the driving force of the story: Greg spends the entire book strategizing and maneuvering to secure the "Most Popular" award, even if it means resorting to questionable tactics.
* It leads to conflict and consequences: His efforts cause him to alienate friends, get into trouble with his family, and ultimately face a difficult decision about what truly matters to him.
* It highlights a theme of self-discovery: Through his pursuit of popularity, Greg learns valuable lessons about friendship, integrity, and what it means to be himself.
While other events occur in the book, Greg's quest for the "Most Popular" award is the central plot line and the driving force behind the story's humor, conflict, and ultimately, its message.