Suppose you're in a dark, mysterious forest, with no memories on how you got there. You wander through the trees trying to find a way out. Just when you think you are alone, you meet someone else. You have no clue who they were or what their intentions are. They could be friendly, or they could eventually murder you for food. If you kill them now, they won't have the chance. A hypothetical answer to the Fermi Paradox. Quickly drawn by yours truly :)