natural disasters nomadic and pastoral societies numbers and counting occupations pandemics and epidemics religion and cosmology resistance and dissent roads and bridges 759 771 783 793 807 823 856 868 Volume IV sacred sites scandals and corruption science seafaring and navigation settlement patterns ships and shipbuilding slaves and slavery 881 898 911 942 954 967 977 social collapse and abandonment social organization sports and recreation storage and preservation textiles and needlework towns and villages trade and exchange transportation war and conquest weaponry and armor weights and measures writing 991 1005 1032 1046 1057 1070 1082 1098 1113 1145 1157 1168 Glossary Chronology by Region General Bibliography Index 1181 1197 1211 1213