World history History 20 Civilization 16 Human ecology 5 Imperialism 5 ചരിത്രം 4 Chronology, Historical 3 Human beings 3 Technology and civilization 3 20th century 2 Biocomplexity 2 Complexity (Philosophy) 2 HISTORY / Historiography 2 Historiography 2 History, Modern 2 Human evolution 2 Study 2 World war 2 15.50 general world history; history of great parts of the world, peoples, civilizations: general 1 Alexander the Great 1 Ancient world 1 Archaeology 1 Babel tower 1 British Occupation of India (1765-1947) 1 British colonies 1 Civilization -- History 1 Civilization story and cultural history 1 Civilization, Modern 1 Civilizations 1 Cognition and culture 1