5 Lost Civilizations

A civilization is defined as “an advanced state of human society, in which a high level of culture, science, industry and a government have been reached.” According to the National Geographic Society, this includes large population centers, division of labor, a class system, a communication system and monumental architecture/distinctive art. Many once-mighty civilizations have dwindled, been absorbed by other emerging empires, or simply vanished over time. Let’s take a look at five of them.