You wake up one morning to find that you have been locked room with no visible way out. On one side of the room is a window that looks into a room containing 100 total strangers. On the other side of the room is a window that looks into a room containing the ten people who are closest to you. Before you are two buttons, a red one and a black one.
You hear a voice from an intercom that explains the functions of the buttons. Pushing the red one releases a poisonous gas into the room with 100 total strangers (killing everyone in that room), and lets the ten people closest to you go free. Pushing the black one releases poisonous gas into the room with the ten people who are closest to you (again, killing everyone in that room) and lets the other 100 people go free. The voice tells you that you must push one of the buttons within 5 minutes, or both rooms will be flooded with the gas, killing everyone except you. No matter what you do, you will be let go after 5 minutes, and no one will know that you pressed the buttons if you choose to do so.
My question to you is this: Which button would you press? Would you save the lives of the ten people closest to you, or 100 total strangers?