Illuminati
A secret society founded by Adam Weishaupt in 1776. The goals of the Illuminati are basically world domination (one world government controlled by the Illuminati members. In order to accomplish this the Illuminati set out to control the most powerful nations of the world , which at the time wer Great Britain and France. The Illuminati claimed to have been behind the Revolutionary War and the Frech Revolution to weaken the two nations governments. However the Bavarian government discovered the Illukinati and forced them underground. They them tried to control contries through more wars they claim to have organized to weaken Europe, for example the Napoleonic wars, and through control over International Bankers which they could screw up the global economy. The Illuminati claim to be behind the WorldWars, WWI was to destroy the Czars and turn Russia to communism, WWII was to build up global communism. They say that there will be a WWIII that will pitt the political Zionists against the Moslem leaders and drain the international community so a world government would have to be accepted.

Do not confuse the Illuminati with Masonry/Freemasonry. They are two very different groups. The Illuminati wants one world government. Freemasons don't really have a goal they are a fraternity of men who believe in a God and are good-natured people. They are do a lot of charity work/community service and aren't very secretive.
Illuminati symbol:

Eye of Providence (the pyramid on the one dollar bill with the eye, also known as the All-Seeing Eye)