Chuckle
I thought the reerence would be well known.............
Then again, us old farts think everyone has read the same stuff we have.
Heinlien's habit of preaching about Social and Economic ideals through his wrok really stands out in SIASL.
But, it did in nearly evertyhing he ever wrote, and still hit the Best Seller list regularly. Which goes a long way to prove how gifted a writer he was.