To be sure, some humans were always doing silly things—but at what point had prime damfoolishness become commonplace? When for example, had the zombi… - Robert A. Heinlein

Don took it and said, “Uh, thanks! That’s awfully kind of you. I’ll pay it back, first chance.”
“Instead, pay it forward to some other brother who needs it.”

“Look, Chief—is it really necessary to kill everybody here? I don’t relish it.”
“Don’t get chicken, son,” admonished Ardmore with an edge in his voice. “This is war—and war is no joke. There is no such thing as a humane war.”

Remember that ancient Persian parable about doubling grains of rice on a chessboard? Four billion people are a smidgen larger than a grain of rice; you quickly run out of chessboard.