Advanced aliens turn radioactivity off on Earth in the hopes of keeping humanity from destroying itself. Only a select few are allowed to even retain the memory of radioactivity (so that when it’s turned on again, they can be the vanguards of the new-new physics).

One of a slew of silly and obvious nuclear-war-is-bad stories Asimov wrote in the 1950’s. Perhaps not the worst of the lot, but still not really worthwhile.

Found In

	Have You Seen These?
	Buy Jupiter and Other Stories