What motivated and sustained the long-distance commerce of the "silk roads"," sea roads" and "sand roads"?

Find an answer to your question ✅ “What motivated and sustained the long-distance commerce of the "silk roads"," sea roads" and "sand roads"? ...” in 📘 History if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.