“There is nobody in this country who got rich on his own — nobody. You built a factory out there? Good for you. But I want to be clear. You moved your goods to market on the roads the rest of us paid for. You hired workers the rest of us paid to educate. You were safe in your factory because of police-forces and fire-forces that the rest of us paid for. You didn't have to worry that marauding bands would come and seize everything at your factory — and hire someone to protect against this — because of the work the rest of us did. Now look, you built a factory and it turned into something terrific, or a great idea. God bless — keep a big hunk of it. But part of the underlying social contract is, you take a hunk of that and pay forward for the next kid who comes along.”

“Good men are dying every moment,” Gretchen replied coldly, “somewhere. Since they did not ask my leave to do so, I feel no particular obligation toward them.”
Source: Jack Faust (1997), Chapter 13, “Tabloids” (p. 219)

Rampart Institute (Society for Libertarian Life edition), speech from 1978, p. 16.
Does Government Protection Protect (1979)

Source: His Dark Materials, The Subtle Knife (1997), Ch. 15 : Bloodmoss
Context: If you're the bearer of the knife, you have a task that's greater than you can imagine. A child... How could they let it happen? Well, so it must be.... There is a war coming, boy. The greatest war there ever was. Something like it happened before, and this time the right side must win. We've had nothing but lies and propaganda and cruelty and deceit for all the thousands of years of human history. It's time we started again, but properly this time...."
He stopped to take in several rattling breaths.
"The knife," he went on after a minute. "They never knew what they were making, those old philosophers. They invented a device that could split open the very smallest particles of matter, and they used it to steal candy. They had no idea that they'd made the one weapon in all the universes that could defeat the tyrant. The Authority. God. The rebel angels fell because they didn't have anything like the knife; but now..."
"I didn't want it! I don't want it now!" Will cried. "If you want it, you can have it! I hate it, and I hate what it does — "
"Too late. You haven't any choice: you're the bearer. It's picked you out. And, what's more, they know you've got it; and if you don't use it against them, they'll tear it from your hands and use it against the rest of us, forever and ever."

Source: The Purpose Driven Life: What on Earth Am I Here for?

A Letter from Cuba (1934)

Source: And the Mountains Echoed

The Complete Neurotic's Notebook (1981), Unclassified

2007
http://www.byrnerobotics.com/forum/forum_posts.asp?TID=19499&PN=0&TPN=1
When asked if he had considered closing his forum, since it was part of the Internet fandom “problem”