v.1 Prehistory and the beginnings of civilization -- v.2 The ancient world -- v.3 The great medieval civilizations -- v.4 The foundations of the modern world -- v.5 The nineteenth century, 1775-1905 -- v.6 The twentieth century

1. Civilization
2. Man
3. Phrehistoric
4. History
5. Ancient
6. Middle ages -- History
7. History
8. Modern -- 19th century
9. History
10. Modern -- 20th century