"Whoever told you about population explosions?"
"Jeeves. They are rather a favorite subject of his. He says if something isn't done pretty soon - "
"I'll bet he said, If steps are not taken shortly through the proper channels."
"He did, as a matter of fact. He said, If steps are not taken shortly through the proper channels, half the world will soon be standing on the other half's shoulders."
"All right if you're one of the top layer."
"Yes, there's that, of course."
"Though even then it would be uncomfortable. Tricky sort of balancing act."
"True."
"And difficult to go for a stroll if you wanted to stretch the legs. And one wouldn't get much hunting."
"Not much."
(from Jeeves and the Tie That Binds, by Sir Pelham Wodehouse)