Related by context. Frequent words. (Click for all words.) 60 era 59 epochs 52 epochal 49 twentieth century 48 millennium 48 civilization 47 momentous 47 Industrial Revolution 46 eras 46 dawning 46 paradigm shifts 46 revolution 46 ancient civilization 45 apogee 44 mankind 43 zenith 43 millenium 43 birth pangs 43 perestroika 43 prehistory 42 historiography 42 conjuncture 42 humankind 42 advent 41 cataclysm 41 Enlightenment 41 civilizations 41 civilizational 40 millennial 40 tectonic shift 40 Dark Ages 40 apotheosis 40 paradigm shift 40 #st century 40 nineteenth century 40 beginnings 40 fiftieth anniversary 40 prophesied 39 feudalism 39 paradigm 39 modern 39 history 39 seminal 39 interregnum 39 cataclysmic 39 #th century 39 Little Ice Age 39 Roman empire 39 supernova 39 totalitarianism 39 antecedent 39 empires 39 firmament 38 foretold 38 singularity 38 progenitor 38 cosmological 38 colonialism 38 defining moment 38 Romanticism 38 revolutions 38 Qing dynasty 38 glorious 38 evolution 38 republic 38 quintessence 38 despotism 38 Stalinism 38 magnum opus 37 cosmos 37 millennia 37 dictatorship 37 mass extinction 37 halcyon 37 evolutionary 37 discontinuity 37 revolutionary 37 Homo sapiens 37 harking back 37 evocation 37 bygone era 37 Roman Empire 37 millenniums 37 Big Bang 37 democratic republic 37 Ottoman empire 37 annals 37 Holocene 37 rebirth 37 inauspicious 37 proto 37 antiquity 37 phenomena 37 Era 37 Pleistocene 37 colonization 37 liberation 36 eighteenth century 36 climatic 36 apocalypse 36 century