A few examples; the Titanic was never called unsinkable until after it sank, no one committed suicide on Black Friday as a result of the stock market crash, and there was no public panic caused by the original War of the Worlds radio broadcast. All of these things were reported by the media at the time.

Think of the stories you see day to day and imagine in 100 years if these are the go-to source for information about our time how skewed a picture you would have of how things actually were.