You can access this elaborate article by either viewing the 37:24 video (Rule from the Shadows - The Psychology of Power) contained in the first section or by reading the material and viewing the videos following the video. The introductory video is just a more concise version of the rest of the post.
The complete post contains a plethora of very useful historical information and links to documents that relate to the development of social-psychological manipulation techniques that not only inform the methods of public relations and advertising, but the policies and actions of our ruling class to manage the views and induce the support of ordinary citizens.
I have little idea about the ideological orientation of the person or people behind this website, and it doesn't offer any information. And the concluding statement, which I don't understand, is not helpful either.
Group psychology is a weapon and like all weapons it is capable of being used for good or for evil. For many years it has been in the wrong hands. It has been hidden from the public and used against them. It's time for the people to pick up that weapon and use it to free themselves.
Time to start studying.