In the class, we are reading a book, "The Tipping Point".
This book tries to prove that there are 3 rules of the "Tipping Point" when a dramatic change occurs.
You may not get any clear explanation of the book from the image above, however, you may understand better after you read the book through.
I am sure the image will look different.^^
* The image was done by Ryu of my class.
You may also compare with the other mind map which looks more scientific.