Contents: v.1. The down of civilization, earliest time to 700 B.C. - v.2. The devolopment of sedentary and nomadic civilizations, 700 B.C. to A.D. 250 - v.3. The crossroads of civilizations, A.D. 750 to the end of the fifteenth century. pt. 1. the historical, social and economic setting. pt. 2. the achievements