In the wilderness, far from anyone else, a shepherd and his flock come across a den of starving wolf cubs. A couple of days earlier, the shepherd found the body of an adult female wolf. The female wolf was probably the cubs’ mama, and it looked like it had gotten killed by a bear.
The small orphans look pitiful, and they will surely die within the day if they have no food. The only food the shepherd has that the wolves will eat are his sheep, all of which he has raised from birth.
You are merciful. You are also the shepherd. Which act of social eugenics do you perform?