Alliance of four great races

In the science fiction television series Stargate SG-1, the alliance of four great races was an ancient alliance of four advanced species that was built over many millennia and existed before the rise of the Goa'uld and the Wraith.

A planet with a facility where they used to meet and interact as "a sharing of clans to share a common interest" was discovered by SG-1 in the 1st season episode "The Torment of Tantalus". Dr. Daniel Jackson was viewing Pentagon archival films of the Stargate Program vintage 1945 when he saw an American scientist named Ernest Littlefield walk through an active Stargate. In a large castle-like structure each race had scribed a wall of text in their own unique language. At least initially, each race was unable to communicate to the other so they developed a common language using the 146 known (to them) chemical elements as basic symbols. Each time the "tablet" was touched a new "page" would appear in the form of a combination of floating molecules made up of specific elements (e.g. hydrogen, sodium, silver, iron, etc. as well as-yet unknown exotic elements, such as naqahdah) which itself was the method each race used to first communicate with the other. As Dr. Jackson proclaimed, the four races broke everything down to basics and created "a truly universal language".

In the 2nd Season episode "The Fifth Race" we learn from the Asgard that the four races were the Ancients, who built the Stargates, the Asgard, the Furlings and the Nox. Amanda Tapping said we would meet the Furlings in Episode 200, although this turned out to be a fantasy sequence and not the true Furlings.

In the episode 'Unending', Thor declared that the Tauri had become the Fifth race of the Great Alliance. The Asgard committed mass euthanasia shortly afterward, after leaving their legacy to them and it is doubtful whether any are still alive. The Ancients all either ascended long ago or died, and there are no known Ancients still alive. The Furlings have never appeared in any Stargate series and remain a mystery, though a few traces of their technology and writing have been found. The races of the alliance who are known to still be alive are the Nox and the Tauri.

Alliance des Quatre Races