There really was a historical Illuminati, an actual organization, founded by a Bavarian professor of law at the University of Ingolstadt, a man named Adam Weishaupt. Although of Jewish ancestry, his family had become Catholic, and he had been educated by the Jesuits, a somewhat mysterious order in their own right. He joined the Freemasons, and then created the Illuminati as an organization within an organization, infiltrating numerous Masonic lodges and taking control of them, as well as the universities. He created the order on May first 1776, and Mayday is a holiday sacred to ancient pagans, and, interestingly enough, to modern communists, and 1776 was the year of the American Declaration of Independence...and many of its instigators were Masons. He chose "Spartacus" as his code name for himself, after the gladiator who rebelled against Rome, and German communists after WWI referred to themselves as "spartacists." Weishaupt preached revolution against all existing social and political order and the destruction of religion, Judeo-Christian morality, and the nuclear family and the institution of marriage. He advocated a global socialist state. He advised his followers to recruit women by telling them that they were oppressed by men. Note that all of these ideas are preached by modern leftists.
Credit: lilith-dark-moon.blogspot.com