What's funny is that in the book, the military is even more segregated by gender than our current military is. The mobile infantry is entirely male, while women tend to be naval officers. The explanation had something to do with women being better able to handle space flight. But the book was written in the 1950s so the science Heinlein used might be outdated.

What's funny is that in the book, the military is even more segregated than our current military is. The mobile infantry is entirely male, while women tend to be naval officers. The explanation had something to do with women being better able to handle space flight. But the book was written in the 1950s so the science Heinlein used might be outdated.