Prometheus was one of the Titans. The name derives from the Greek word meaning 'forethought'. Prometheus was presented to be the protector and benefactor of mankind. Zeus decided to hide fire from mortals as punishment. Prometheus, in an effort to help humanity, managed to steal fire back and give it to humans. More enraged, the father of gods punished Prometheus by having him chained to a rock, where an eagle ate his liver during the day, and the liver was regenerated during the night due to Prometheus' immortality.