This book is part of a book series called Whats the Big Idea? a History Of the Ideas That Shape Our W .

This book has been graded for interest at 8-12 years.

This book was published 2017 by Cavendish Square Publishing .

Tim Cooke is the author of National Geographic's Ancient Aztecs: Archaeology Unlocks the Secrets of Mexico's Past and Concise History of World Religions: An Illustrated Time Line .