1. What were the significant environmental and cultural effects of the movements of people in this period? 2. In what ways did transregional trade influence the beliefs of Islam and facilitate the spread of Islam? As Islam spread, in what ways did beliefs and practices adapt or change? 3. How did postclassical imperial rulers in east Asia and the Byzantine empire incorporate traditional sources of power and authority with innovations to establish or increase their power ? 4. Why or how did economic productivity decrease dramatically in western Europe in this I period, and how did people adapt to deal with it? 5. In which ways did Hinduism and the caste system provide postclassical stability in south Asia when governments did not?