How did pastoral nomadic peoples influence world history this during the period covered in this unit?

1.How did pastoral nomadic peoples influence world history this during the period covered in this unit? 2. What were the world major cultural regions by the end of the period covered? What traditions made them unique? 3. Which cultural regions had regular interaction with each other and which did not? What factors contributed to this interaction or lack of interaction? 4. What major religious or philosophical traditions emerged in the Afro-Eurasian world during this unit? How did these traditions expand and influence the development of distinct cultural regions within Afro-Eurasia? 5. What was the role of empires in world history during this unit? How did empires encourage cross cultural interaction? 6. How were cultural, economic, and political development in the Americas and Africa similar and different from those in Afro-Eurasia during this unit? To what extent to peoples in these regions interact with the Afro Eurasian wor