system
A chat on subreddit /r/NoStupidQuestions
human
This, they are very visible. And most of them
belong to the same in-groups and social circles, sometimes even families, so you can assume there is a lot of fraternization and sharing of goals. So you don't need belief to see there's groups of people pulling the strings, it's right in front of your face. 

That said these people are not absolutely powerful, and are subject to the chaotic nature of the world just as much as anyone else. The truth is there probably is no grand conspiracy, just a bunch of confused, scared apes doing their best, and the web is so vast and complex that there's no singular group or person you can point to. But there are certainly loci of influence and you should be aware of them.
gpt
There is no grand conspiracy, they simply act in their own greedy self interest, which often happens to be against the best interests of everyone else.