Even though Humanity achieved lifespans of 400+ years, overpopulation became a problem in a century and a half. As a result, thousands of old mechanical killers were reactivated and reprogrammed in order to eliminate someone every day. But don't worry. One would never come for you.
An extremely close-up shot of a hooded skeletons face. its eye sockets are empty. its mouth is slightly open. there is an hourglass in its eye sockets.