There is some corroboration for this finding out there, some have even taken a scientific approach to its study. Showing visual connections across organizations is easier, while pointing out the particular people involved can be trickier sometimes. There are people who do not want to be known and would rather stay hidden behind the organzations that they operate. Like a "black box", we can only come to understand it by taking note of what moves around it, for example by "following the money". Generally, one can often learn a lot about the current state of the world by what has been hidden (e.g.: Operation Paperclip, MKUltra, Gladio, Northwoods, etc.)...but it gets very dark, very fast.
Serious Questions: What are you trying to understand? What do you hope to accomplish through it?