Step-by-step explanation:
I can't write a whole essay for you. However one thing I can say is that everything that anybody has ever done to Truman or said to Truman, has been scripted or scheduled. The "directors" of his life have been manipulating him and they know who to make say what and how they should do it this influences Truman life.
Short version: Manipulation or mind control (you can watch documentaries on mind control - it's the control of one's views, and morals... in my understanding)