The Protoculture
This is an ancient humanoid alien race that artificially created the majority of the known intelligent humanoid lifeforms in the galaxy, including the Zentradi, the Zolan and the Human races.
The Protoculture civilization's influence and legacy on the Macross Frontier timeline is seen through the use of space fold technology, overtechnology and macronization/micronization technologies by all the races they created. The even older race of insectoid alien lifeforms called Vajra influenced the Protoculture themselves to create their Super-Dimension energy based technologies such as the "Fold System" which allows starships cross interstellar space through another dimension as well as the Super-Dimension energy weaponry seen in most space warships.
The Vajra made use of one of the Protoculture's planets as its homeworld "nest" after the civilization had disappeared long ago. Grace O'Connor, the main antagonist from the series, had also researched the Protoculture to such extent that it became her driving obsession to surpass them.
Read more about this topic: List Of Macross Frontier Terminology