I have done a lot of research about this topic before I feel I should say somethin lol. That same symbol appears in the 1 dollar bill as you must already noticed , and in it you can read "Novus Ordo Seclurum" in latin, that is best translated to New World Order.
This eye, the Eye of Providence, is adopted from the egyptian mythology as the Eye of Horus, the god of the sky , but a lot of cultures had adopted it as the eye of God who sees everything but it's not, Illuminati used this symbol in the dollar saying is the eye of God . They are a very very old secret society that started in 1770's . There are a loooooot of theorys about them, one is that members of the Illuminati group, and I mean the important members, the ones that have generations and generations in the group,are the ones that make the important decisions in this world,the BIG decision...the ones that can change the world, they even select the next president of the USA. What's their purpose ? The so-called New World Order.
Maybe this New Order doesn't seem so bad, cause the objective of the fundation was to improve the world trough "light" there's where the name Illuminati o Iluminados (Enlightened) come from; that light is the new way of thinking that was popular in that time , they wanted to make an equal and free society...a perfect society. Now the problem is here : to accomplish that perfect society they need to destroy EVERY difference between human beings, that means no religion, no posesion, no church, no other organization, etc etc. They need to control everything in order to succed. That's when we have a problem with them right? we don't want anyone telling us not to believe in God and guess what, they don't tell you that, they just....don't even mention it, like there was no God, like heeey we got science, we don't need God, there's other stuff, we are cool, we are good, we help people, etc.
Look I dont know if any of this is true, it sounds pretty much like an interesting movie someone should make haha , but if this exists, they are not gonna tell you, they would work faar far away from the public eye and they would say the are good. Maybe in a worldly way they are....but non in a christian way.
Anyway this is a long topic, if you want to know more, u can navigate the internet or look for some books cause this topic is LOOOONG like LOOOOOOOOOOOOOOOONNGG lol.