Note: Some of these thought experiments are my own, and a number of them appear throughout the philosophical literature on race. Charles Mills was a source for some of them, I think. Sveral of them have come from Jonathan Glasgow, and a few are unique to him, so I should at least give some credit here for that. I've never seen this one in particular anywhere else. Given that I'm giving him credit in this post, I'll just quote his own description of the case:
Everyone above the age of ten months is being killed by a virus that itself will expire as soon as it kills the last person who is more than ten months old. In a furious effort as they await their doom, the remaining scientists devote themselves to finding a way to finding a device that can keep the infants alive until they are old enough to survive on their own. [Jonathan Glasgow, A Theory of Race, p.121]Do races cease to exist upon such a disaster?