[Publius]

Heinlein worked his libertarian and objectivist ideas out the fullest in The Moon is a Harsh MIstress. But they also pop up in some of the Future History short stories, to include the last books he wrote. I think the "air money" concept was something that gestated over a period of decades.

TANSTAAFL does in fact come from "Moon", and I've used it quite a bit in speeches about transportation policy.

[woodnboats]

“Heinlein worked his libertarian and objectivist ideas out the fullest in The Moon is a Harsh MIstress. But they also pop up in some of the Future History short stories, to include the last books he wrote. I think the “air money” concept was something that gestated over a period of decades.”

Right you are, but I’m hard pressed at the moment to think of any other references to “air money”. I re-read all his stuff (and re-re-read, and re-re-re-read... well, you get the idea), except for everything after “Time Enough For Love”. I think in his later years he begame almost Randian in his style, although not as good and with less to say. Having written an essay on how to write science fiction, he forgot what he had written.

I’ll pay closer attention now, just to satisfy myself;-)

Kirk