The ORIGIN who was already being slowly corrupted by the desires of his creations was looking through the flow of fate. The ORIGIN was trying to see what kind of changes the humans he created would bring about.
The ORIGIN created humans with the idea of making a race different from the Gods. When he created the Gods he wanted to create a perfect race that could accompany him through eternity, but that was a failure. The Gods he created were not anywhere near perfection. So The ORIGIN decided to create humanity, a race that had nothing, to begin with but had unlimited possibilities.
Due to his previous mistake, with the Gods, the ORIGIN created humanity without any emotions. The humans did prosper a bit despite their lacking emotions but they didn't go that far until they were destroyed by decreasing birth rate as well as the Gods playing with them.