Story:

The Gilberts (and all other -ilbert entities on planet Gilbert) were the first creatures in the universe. The Gilberts (and other -ilbert entities) would later become mostly extinct after the creation of humans. The humans in the Gilbert universe were artificially created, and were made to be the ultimate life form (to the -ilberts anyway), and abused their power, eventually killing off majority of the -ilberts. The Gilbert planet would eventually be known as "Earth" by the humans. The few Gilberts (and other -ilbert creatures) would go into hiding, to never be seen again.