Another early prescient vision of thought-manufacturer and mind-manipulator culture, as well as a great read is the Frederick Pohl and Kornbluth story Gravy Planet, home of the great quote 'power ennobles, and absolute power ennobles absolutely'..

It's from the 50's but it's a shockingly accurate picture of our modern world with advanced propoganda, globalism etc .. and it's free here https://archive.org/details/galaxymagazine-1952-08 .. enjoy :)