I read it in a book and thought it explained a lot of what our corporate, and media driven society has become. There are agendas and you can almost track their movement, and how the window of what is socially acceptable has moved. I think everyone should know and study the overton window concept.
Certain third world countries would grow them in contaminated areas and then sell them back to the west.
BTW, I appreciate your username. There's an episode of The Good Fight that talks about it.