Civilization, Ancient 30 Prehistoric peoples 6 Archaeology 4 Group identity 4 Social archaeology 4 Social evolution 4 History 3 History, Ancient 3 Lost continents 3 Civilization, Ancient world 2 Collective memory 2 India-Civilization 2 Interpersonal communication 2 Lemuria 2 Material culture 2 Memory 2 Politics and culture 2 Progress 2 Religions 2 Space and time 2 Written communication 2 Agriculture 1 Antiquities, Prehistoric 1 Civilization 1 Civilization Ancient Mediterranean 1 Civilization Near East 1 Civilization, Ancient, In motion pictures 1 Civilization, Ancient, in literature 1 Civilization, Ancient--Extraterrestrial influences 1 Civilization, Ancient-Poliitical aspects 1