In Deus Ex: Mankind Divided, the Majestic Council of the Twelve is a shadowy group of people who are plotting to take over the world. Before the 2030s, Majestic 12 was an Illuminati division devoted to controlling technology and communications.
However, following a coup led by Bob Page, one of Majestic 12's leaders, the organization secedes from its parent, assuming control of the entire Illuminati infrastructure and becoming one of the primary antagonists of Deus Ex: Mankind Divided.
Deus Ex: Human Revolution — Sarif Industries Explained
In the mid-twentieth century, the Illuminati leadership realized that it needed to control financial and technological matters. In order to accomplish this, they established two new Illuminati branches: the Bilderberg Group and Majestic 12. Majestic 12 had been in operation since 1947. A UFO was reported to have crashed, intact, in Roswell, New Mexico, earlier that year. After the military seized the alien artifacts, the President of the United States appointed a blue-ribbon panel (codenamed Majestic 12) to investigate them.
The Illuminati ensured that MJ12 was stacked with their own high-ranking members, and the US government quickly hushed up and denied the Roswell incident. It is unknown whether the crashed UFO was real or part of an elaborate Illuminati hoax to cover up the creation of MJ12. In any case, MJ12 became a member of the Illuminati power structure, dedicated to researching and exploiting post-atomic technology.
Majestic 12 was the Illuminati's most important arm in the twenty-first century. This was due to the enormous power and influence made possible by technology. Majestic 12 distributes and suppresses technology, controls the distribution of both legal and illegal drugs,
Read more on gamerant.com