Prehistory refers to periods of time before written records. During the Paleolithic era in Western Europe, hunter-gatherer humans lived in caves and left paintings of animals on cave walls. These paintings provide insight into their beliefs and culture despite the lack of written records. During the Neolithic era in the Near East, settled agricultural societies developed where people domesticated plants and animals. Evidence of their beliefs can be seen in structures like communal buildings and large megalithic monuments used for burials. As societies became more complex, representations of humans changed and communal identity emerged as important.