The flying saucer appeared one morning, and it just sort of hanged there in the air, above the cities.
It didn't communicate by sound or light, everyone just got a single foreign thought, as a sort of memo from the saucer. "We are the truth. Ask."
It wasn't long until the internet was full of advice on how to telepathically communicate with the alien saucer. It was a simple meditation, concentrating on it, and asking a question.
Every answer was precise and true. Every forum on the net was full of all sorts of fun suggestions on what to ask.
Soon, everyone knew about JFK, cold fusion was figured out within 12 hours, mysteries of our history and the universe were solved, and the more people got to know,
the greater their hunger for knowledge got. Nobody thought much of an article in a tabloid about a woman who talked to the aliens and shot her cheating husband.
Everyone started asking about other people's thoughts, secrets and betrayals.
Husbands and wives started brutally killing eachother, ethnic and racial tensions exploded, everyone became so efficient in techniques and tactics of killing.
I traveled far away from people, packing just some food, and a small tent for meditation. Day after day, I asked "how can I stop this". The answer is always "you can't".