Answer:
Early humans survived because they created tools to fight and hunt for food. Also the creation of fire helped keep them warm and dry. Light helped scare predators and animals away.
The Pentagon Papers<span>, officially titled </span>United States – Vietnam Relations, 1945–1967: A Study Prepared by the Department of Defense<span>, is a </span>United States Department of Defense<span> history of the </span>United States<span>' </span>political-military involvement<span> in </span>Vietnam<span> from 1945 to 1967. The papers were released by </span>Daniel Ellsberg<span> who had worked on the study, and first brought to the attention of the public on the front page of </span>The New York Times<span> in 1971.</span>