Codename: Angelus

At the end of the XXI century, a catastrophe happened, that brought the world to its demise. Wait! I'm living in the mid-XXI century and the world is fine! The Earth isn't scarred, we have adavanced technology, space colonies, underground cities on the Moon and Mars and we're finally launching our first generation ship bound to Gliese 581. Where does this crap come from? Wait! What if someone tampered with my memory?