Dear Diary.
Dear Diary,
I made a decision. A really, really big one.
I won't go into the gory detail of what I have done... I'm not sure I could even if I wanted to... Besides it will be all over the news tomorrow. They will make some story up about me, about how I was a crazed maniac full of malice and wickedness. It's a shame really, that no one will ever know why I did it. They won't know that I saved them from a worse fate. They won't ever see the destruction they caused to the Earth, and the rest of the galaxy. We littered it with the stench of our existence and once we deemed it too toxic for life. What did we do? We moved on to the next galaxy, and the next, and the next. Until there were no more. Until we had broken time and space looking for one more place we could stain with our existence. Sure we did do some great things along the way, we cured cancer, and world hunger and created eternal peace among all living things. Small things compared to the havoc we wrecked to reach those ends. But no one here will see it that way... They will see me as the antagonist to life, I'll go down in history as worse than the devil himself, because at least he didn't start the apocalypse.
I have to go now dear diary, they are banging down my doors as we speak. This will be the only page of you that survives... Maybe they'll frame you and hang you in their government building once everything has been restored... Maybe they'll bury you under the mountains of secrets they already keep. Who knows. But I know someone, somewhere, thousands of years from now will read you and be perplexed perhaps, astounded by the gibberish I speak. But I want someone to know, to know why I did it, to maybe understand that for the sake of humanity, I had to change the course of the game. Now at least, they have a chance my dear diary, they will see what the face of evil looks like and maybe, just maybe, it will scare the humanity back into them.