Supreme is actually Ethan Crane, the adoptive son of Joe and Joanne Crane of Littlehaven, USA. He gained his exceptional powers through exposure to Supremium radiation in 1925, when he was only five years old. The radiation caused his hair to turn white and gave him a variety of formidable abilities including flight, incredible strength, near invulnerability, super-senses, the ability to project heat beams from his eyes and speed-supreme. As a boy Ethan Crane had adventures in and around the small town of Littlehaven as "Kid Supreme." He also joined the time-traveling heroes of the League of Infinity.
In 1939, he left Littlehaven for Omega City, changing his name to simply "Supreme." He served in the military during World War Two and joined the Allied Supermen of America, the first superhero team. Supreme later became a founding member of the Allies, the premier superhero team of the 1960s.
In 1968, Supreme left Earth to explore deep space. He lost his memory following a confrontation with the mystic being Jack O'Lantern and only recently returned to Earth after years of confusion and amnesia. In his secret identity as Ethan Crane, he is now a comic book artist for Dazzle Comics. He is in love with comics writer Diana Dane, who learns of his dual identity.
After 'Judgment Day', he resumes his place in the now-formed superteam The Allies. On returning to Earth, Supreme learned that his entire history is periodically revised with old versions of himself and his friends and foes being wiped from existence and replaced with new, updated incarnations. The previous versions of himself are consigned to a limbo dimension called the Supremacy.
The Allied Supermen of America
The League of Infinity
Radar the Hound Supreme
Korgo the Space Tyrant