How did globalization come about?

There is fierce debate among scholars about when globalization began. The debate stems partly from the lack of a precise definition of the word. Some argue that globalization as a phenomenon began with the earliest human migratory routes, or with Genghis Khan's invasions, while others view it as far more contemporary. Many view globalization in its current form as a modern phenomenon, beginning no earlier than World War II. The term itself has been in common use since the 1980s

The answer is he rejected any use of christian imagery. hope this    

They learned to make tools.  hope this !   mark me as brainiest!