Algis Budrys' "The Stoker and the Stars" (as by John A Sentry) (short story, post-war, free): Familiarity breeds trust
This is the story of an unnamed human war veteran, one of the few war survivors, seen through the eyes of a colleague. One fine day, he signed up for a dull & risky job on the spaceship Serenus at a Martian landing field - Serenus was then on its way to Alpha Centauri on a trading trip.
He jumped ship during trading, & signed up as crew with the aliens. Since then, he's been jumping ships all over galaxy, going farther & farther on all sorts of alien ships. One lone harmless man just wandering around. Effect of his wanderings on the attitudes of aliens towards mankind has, however, been remarkable...
- Robert Heinlein's "The Green Hills of Earth" (download old radio adaptation): One of the less interesting but rather famous stories of Heinlein, with the hero behaving within the spaceship in ways very similar to one in this story.
Fact sheet.First published: Astounding, February 1959.
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Among the stories from Analog/Astounding issues edited by John W Campbell, Jr.
Related: Stories of Algis Budrys.