What motivated and sustained the long-distance commerce of the Silk Roads, Sea Roads, and Sand Roads?
Why did the peoples of the Eastern Hemisphere develop long-distance trade more extensively than did those of the Western Hemisphere?
“Cultural change often derived from commercial exchange in the third-wave era.” What evidence from this chapter supports this observation?
In what ways was Afro-Eurasia a single interacting zone, and in what respects was it a vast region of separate cultures and civilizations?
Looking Back: Compared to the cross-cultural interactions of earlier times, what was different about those of the third-wave era?