Quotation source, please

I was asked where

"The Earth is just too small and fragile a basket for the human race
to keep all its eggs in."

comes from. It's usually attributed to Heinlein (although sometimes to Clarke or Sagan) but the closest I've come a bit of searching is sometimes it is said to have come from a speech, perhaps given in 1967. Anyone got anything more precise than that?

From ISS

From ISS

"Pete Seeger and Occupy Wall Street Sing 'We Shall Overcome' at Columbus Circle (10/21/11)" (Watch on YouTube)

Also posted at Dreamwidth, where there are comment(s); comment here or there.

My idea for a post-2300 2300 AD campaign

I began with this summary of the intelligent races and their fates to date in GDW's 2300:

Humans (nearly crashed their civilization with a nuclear war)
Sung (conquered by the Man-Can alliance, IIRC. Human client species, anyway)
Xiang (conquered by the Sung, now presumably a Human client species)
Klaxun (probably a client race of humanity)
Eber (bombed themselves into the stone age, now probably a client species of the Humans... I am beginning to see why the Kafer are so paranoid about us)

Kafers (doing their best to conquer the galaxy; sadly for them, humans can probably conquer the Kafer)
Ylii (enslaved by the Kafer)

Medusae (extinct)
Little Guys (extinct)

Pentapods (slaves of intellects vast and cool and unsympathetic)

AGRA Intelligence (of a level of technological sophistication humans can barely detect, let alone understand)

(Did Bayern find another extinct race?)

Anyway, it looks to me like what happens is if you don't lose space travel by nuking yourself, you probably get to explore until you run into a more powerful civilization that then conquers you. And humans have run into two more powerful civilizations so far.

So...

Humans: pawns in the Great Struggle between the Pentapod's Owners and the AGRA Intelligence!

I see it as a high school based comedy where one of the characters is a Pentapod emulation of a human, and another one is an AGRA Intelligence human meat puppet.

The high school PE teacher is a Kafer!

Uh Oh

Fig has suddenly discovered playing of the sort he initiates. Like pouncing on my feet at night. Like swatting Groucho on the behind as he walks by...

Tales of Tomorrow: Betelgeuse Bridge (Based on a story by William Tenn)

Betelgeuse Bridge

One of many PR-related SF stories from this era, this is about the effort to convince humanity to accept contact and trade with highly advanced snail-like aliens from Betelgeuse. Unfortunately for our PR guy, the Betelgeusians turn out to be better at playing us than we are at playing them.

The sound on these is pretty rough.

Tales of Tomorrow: Martians Never Die (Based on a story by by Lucius Daniel)

Martians Never Die

When his boss/romantic rival returns from Mars, Stern plots to kill the fellow before he takes back the power of attorney he gave Stern before going to Mars; wealth and romantic conquest will be Stern's! But he doesn't understand the nature of his boss's Martian guard and matters develop poorly for Stern.

The text of the story, which is somewhat different from the radio play due to the need to convey certain things to audio audiences, is here:

Martians Never Die

In it we see romance and money is truly entangled in this case:

"As soon as we are able to leave here," he said, drawing her close and squeezing her gently, "I'll take steps to have him declared legally dead. Then we'll get married."

"That's not much of a proposal," she smiled. "But I guess I'll have to accept you. You have Clyde's power of attorney."

Tales of Tomorrow: The Girls From Earth (Based on a story by Frank M. Robinson)

The Girls From Earth

Two women from Earth, one a criminal who sees being sent off to marry a man she has never met as a better choice than years in the slammer and the other an innocent spinster, travel to a backwater world. Life in the colonies turns out to be a lot more like a low-tech I Love Lucy episode than they expected.

This was also adopted for X Minus One. Almost nothing of the original story survives in this version, not the setting nor the characters nor the actual story.

The sound on this is pretty bad. I am not sure what happened in about half of it.