The titans were all banished to imprisonment in the Lower World. However two children of the titans which had fought Jupiter were not left with the titans. The elder brother which was named Prometheus, did not care about the luxuries of the Mighty ones instead wished to prepare the world for anything to come. While the younger named Epimetheus was always thinking of the past instead of the future.
Mankind was no longer happy Prometheus 's heart was filled with sadness seeing this as well as seeing how they were living in caves and holes shivering from the cold, dying from starvation, and hunted by beasts.
This will be punishment for the disobeying and giving fire to the pathetic filth fire and helping them out!!! GO PANDORA!!!
The gods had completely refused therefor Prometheus decided that he would take it into his own hands.
Curiosity Leads to Plagues
The Plagues have been released due to Pandora's curiosity. Sickness is now in the world making life more miserable. Just like Jupiter wanted.