In his work for the Federation, John Gill developed the Cultural Dynamicism Chart. (Starfleet Dynamics). Gill also described Jonathan Archer as being one of the greatest explorers of the 22nd century. (ENT episode: "In a Mirror, Darkly", Part 2)
Gill wrote a book titled Small Steps and Giant Leaps: A History of Humankind in the Galaxy that was published in 2143. He also published a multi-volume series about World War III which became considered to be the definitive work on the subject by the early 24th century. Gill made it known that the he believed the peace treaty that brought the war to an end overreacted by banning genetic engineering. (ST reference: Federation: The First 150 Years)
- Federation: The First 150 Years gives the publication year of Gill's book as 2143 which is possibly too early to be in his lifetime.
Some time in the early 2250s, Gill was an instructor of history at Starfleet Academy. Among the students who studied under him was James T. Kirk. Among the topics covered in his pre-Federation history class was the Dove Society. (TOS novel: Strangers from the Sky, Last Unicorn RPG module: Starfleet Academy Handbook)
In 2261, Professor Gill was assigned as a cultural observer on the planet Ekos. He saw the suffering of the Ekosians, and decided to violate the Prime Directive and manage the society to mirror Nazi Germany, so that they could become more efficient, while pronouncing himself Führer.
While the plan worked at first, Gill's second-in-command, Melakon drugged Gill and seized full control, and began practicing the evils that the Nazis performed on Earth in the 20th century and began torturing and murdering Zeons.
When the USS Enterprise visited the planet in 2268, they discovered that Ekos was preparing to invade Zeon. Fortunately, Captain Kirk, Commander Spock and Dr. Leonard McCoy were able to revive Gill and get him to call off the invasion, and denounce Melakon. Unfortunately, Gill was shot by Melakon, before he himself was killed. Gill died soon afterwards in Kirk's arms, having admitted that he made a terrible mistake in violating the Prime Directive. (TOS episode & novelization: Patterns of Force)
|Nazis in Hitler's Germany||Hermann Göring • Grün • Adolf Hitler • Josef Mengele • unnamed Humans|
|Vosk's Na'kuhl Nazis||Ghrath • Kraul • Vosk • unnamed Na'kuhl|
|Ekosian Nazis||Daras • Eneg • John Gill • Melakon • unnamed Ekosians|
|Hirogen Nazis||Karr • Turanj • unnamed Hirogen|