Even Stranger in a Strange Land, which many Heinlein fans point to as evidence of how “progressive” he was, had some pretty misogynistic ideas throughout—including the role of women on spaceships.
The first human expedition to Mars (the event which set the story in motion) failed because Earth sent a mixed-gender crew who ended up murdering each other over sexual jealousies. The second human expedition to Mars went off without a hitch because the crew was made up entirely of men, who are of course naturally more rational (at least when there aren’t any women around). The idea of avoiding violent conflict by sending an all-woman crew was apparently too far-fetched to even warrant consideration.
