This is the overall (universal) message of a story
What is a theme?
Kudzu can grow about a foot a day, or approximately 60 feet in a growing season. Huge tap roots help the plant survive dry periods and make kudzu impossible to pull up. The vigorous vines completely cover abandoned fields and trees. The large leaves block out the sun and smother existing plants.
Central Idea: Kudzu grows quickly and easily.
Throwing the baby out with the bathwater
What is discarding something valuable with things that are undesirable?
What is to ignore someone?
What is being treated the way you treat others?
A perfect storm
What is the worst possible situation?
The devil is in the details
What is it looks good from a distance but there are problems when looking up close?