@Wetrix you mentioned IQ but you have to remember, there are actual people with an IQ below 90. Its like George Carlin said, "think of how stupid the average person is and realize half of them are stupider than that". I don't think most people are stupid, but there are 1-2 billion actual dumb people in the world just by the odds. They live their daily lives, make decisions, and many of them believe nonsense. It cannot be helped really.