The threshold of vulnerability -- pt. 1. Pumps and conveyor belts. The late ice age orchestra, 18,000 to 13,500 B.C. -- The virgin continent, 15,000 to 11,000 B.C. -- Europe during the great warming, 15,000 to 11,000 B.C. -- The thousand-year drought, 11,000 to 10,000 B.C. -- pt. 2. The centuries of summer. The cataclysm, 10,000 to 4000 B.C. -- Droughts and cities, 6200 to 1900 B.C. -- Gifts of the desert, 6000 to 3100 B.C. -- pt. 3. The distance between good and bad fortune. The dance of air and ocean, 2200 to 1200 B.C. -- Celts and Romans, 1200 to A.D. 900 -- The great droughts, A.D. 1 to 1200 -- Magnificent ruins, A.D. 1 to 1200 -- Epilogue. A.D. 1200 to modern times.