In Greek mythology, Epimetheus ("hindsight", literally "hind-thought") was the brother of Prometheus ("foresight", literally "fore-thought"), a pair of Titans who "acted as representatives of mankind" (Kerenyi 1951, p 207). They were the inseparable sons of Iapetus, who in other contexts was the father of Atlas.
According to Plato's use of the old myth in his Protagoras, where he puts it in the mouth of the old philosopher, the twin Titans were entrusted with distributing the traits among the newly-created animals; Epimetheus was responsible for giving a positive trait to every animal, but when it was time to give man a positive trait, lacking foresight he found that there was nothing left. His brother Prometheus then stole fire from Zeus and gave it to man, and was punished for his impiety. As further punishment, Zeus created Pandora, the first woman, for Epimetheus, knowing that he would fall in love with her despite the warnings of his brother, the embodiment of foresight, who told him never to accept a gift from the Olympian gods, with whom the primordial Titans, sprung from Mother Earth, were ever at odds.
In alternate versions, Prometheus is the one who fashions man from inert clay.
According to Hesiod, who related the tale twice, (Theogony, 527ff; Works and Days 57ff) Epimetheus and Pandora were married. Pandora had been given a box by Hermes and was instructed never to open it. However, Hermes also gave her curiosity, so she opened it anyway releasing all the misfortunes of mankind. She shut it in time to keep one thing in the box: hope. Thus mankind always has hope in times of evil.
- Kerenyi, Karl, 1951. The Gods of the Greeks, pp 209ff.