Everything was normal on earth, and everything was decent. Yes, there were diseases, war, corrupt things, bullies, death... But everything was normal.
Then one day, out of boredom, a brony tried to contact the fictional land of Equestria. It turns out, after weeks of failed attempts, there is a method that works! Write a letter on a piece of paper, roll it up, stamp it, and throw it in a fire. The message will be sent to Spike, the purple dragon from Ponyville, and possibly Princess Celestia's fireplace!
Back in Ponyville, word got out that new creatures called "humans" have been discovered! Ponyville, and the rest of Equestria for that matter, were a BUZZ about these humans.
Humans were what everypony was talking about! Then, a pony wrote a book on what little was known about these humans, and the humans are now the number one thing on everypony's mind.