Status Updates From The Marching Morons

Short but great story of a world of morons and how do you deal with them when they outbreed you.

"Could you give us some indication of your plan?" the psychist asked.

"Ever hear of lemmings?"

"No."

"They are—were, I guess, since you haven't heard of them—little animals in Norway, and every few years they'd swarm to the coast and swim out to sea until they drowned. I figure on putting some lemming urge into the population."

"Say!" said Barlow. "Those movies about babies—was that your propaganda?"
"It was. It doesn't seem to mean a thing to them. We have abandoned the idea of attempting propaganda contrary to a biological drive."
"So if you work with a biological drive—?"
"I know of none which is consistent with inhibition of fertility."

"...while you and your kind were being prudent and foresighted and not having children, the migrant workers, slum dwellers and tenant farmers were shiftlessly and shortsightedly having children—breeding, breeding. My God, how they bred!"
"...Your intelligence was bred out. It is gone. ... The just-average, they'll-get-along majority took over the population. The average IQ now is 45."

"...You were a blind, selfish stupid ass to tolerate economic and social conditions which penalized childbearing by the prudent and foresighted. You made us what we are today, and I want you to know that we are far from satisfied. Damn-fool rockets! Damn-fool automobiles! Damn-fool cities with overhead ramps!"