Answer:
The best summary of the book Sugar Changed the World is as follows:
The writer talks about how the discovery of sugar had a significant influence on world events
According to the text of Sugar Changed the World, the writer talks about the discovery of sugar and how it had tremendous effect on the world and how it also affected slavery because of the work on the plantations
As a result of this, we can see that the primary purpose of the prologue of the book is to show the readers about the importance of sugar and how it is used by people of the world in their food.