Triplanetary (the Original)

Triplanetary is a space opera by E. E. Smith. This is the original version first serialized in Amazing Stories magazine in 1934. Smith later reworked the story into the first of two Lensman prequels which was then published in 1948.
Triplanetary covers an eons-long eugenics project of the super-intelligences of the Arisians an alien race breeding two genetic lines to become the ultimate weapon in their cosmic war with the Eddore.