Prometheus is famous for a couple of seemingly unrelated stories: (1) the gift of fire to mankind and (2) being chained to a rock where every day an eagle came to eat his liver. There is a connection, however, and one that shows why Prometheus, the father of the Greek Noah, was called the benefactor of mankind.
Prometheus - Gift of Fire to Mankind
Zeus sent most of the Titans to Tartarus [see Hades' Realm] to punish them for fighting against him in the Titanomachy, but since second-generation Titan Prometheus had not sided with his aunts, uncles, and brother Atlas, Zeus spared him. Zeus then assigned Prometheus the task of forming man from water and earth, which Prometheus did, but in the process, became fonder of men than Zeus had anticipated.